Multi-energy coupling heat pump heat supply system and working method thereof

Abstract

The multi-energy coupling heat pump heat supply system comprises a solar heat collection system, an air source heat pump system and a water source heat pump system which are connected with a user side to form a heat supply loop in a multi-energy coupling mode, one part of heat energy generated by the solar heat collection system is transmitted to the user side, and the other part of heat energy generated by the solar heat collection system is stored in a heat storage water tank; one part of heat energy generated by the air source heat pump system is transmitted to the user side, and the other part is stored in the heat storage water tank; the heat energy input end of the water source heat pump system is communicated with the heat storage water tank, the water source heat pump system transmits heat energy in the 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 heat storage water tank is communicated with the air source heat pump system through a second defrosting pipeline. The working method comprises different working methods of a solar heat supply mode, a solar heat storage mode, a solar defrosting mode, an air source heat pump heat supply mode, an air source heat pump heat storage mode, a heat storage water tank heat supply mode, a heat storage water tank defrosting mode and a water source heat pump heat supply mode, and the working methods are selected according to actual conditions, so that the service life of a system unit is prolonged; and the overall economical efficiency and heat supply performance of the system are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of heating systems, and in particular to a multi-energy coupling heat pump heating system and a working method thereof. Background Art

[0002] Solar air source heat pump is a technology that efficiently utilizes environmental thermal energy. The combination of the two provides a new idea for energy conservation and emission reduction for heating systems. However, the solar energy and air source heat pump coupling system is still limited by environmental conditions and has a limited scope of application. The existing technical solution system is complex and requires a large investment. This patented technology achieves complementary advantages through the rational use of solar energy, air source heat pumps and heat storage technology. The system has a wide range of applicability and can operate under different weather conditions. It can achieve all-weather operation and energy-saving effects, improve the overall energy efficiency, and reduce the investment cost of the heating system.

[0003] For example, a Chinese patent with publication number: CN202320371559 discloses a multi-energy coupling heating system, including a heating return water pipe, a main heating equipment, a buffer water tank and a heating water supply pipe connected in sequence, the main heating equipment can heat the water transported to the buffer water tank by the heating return water pipe, and a first valve for controlling the water flow is provided between the heating return water pipe and the main heating equipment; an auxiliary heating equipment is connected to the buffer water tank, a first auxiliary heating pipe is provided between the heating return water pipe and the buffer water tank, the first auxiliary heating pipe is arranged in parallel with the first valve, and a second valve for controlling the water flow is provided on the first auxiliary heating pipe; an energy storage device is also connected to the buffer water tank, an energy storage branch and a first reflux branch are provided between the buffer water tank and the energy storage device, the buffer water tank, the energy storage branch, the energy storage device, the first reflux branch and the buffer water tank are connected in sequence to form an energy storage loop, and a third valve for controlling the water flow is provided on the energy storage branch.

[0004] The heating system recorded in the above patent ensures the heating effect and economy of the heating system, while improving the efficiency, safety and stability of the heating system. It solves the technical problems of high investment cost, high operating cost and unstable system of the multi-energy complementary heating system in the prior art. However, it cannot solve the problems of single working mode, limitation by environmental conditions and limited scope of application of the multi-energy coupling heating system in the prior art. Summary of the invention

[0005] In view of the deficiencies in the above-mentioned background technology, the present invention proposes a multi-energy coupling heat pump heating system and a working method thereof, 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 invention is achieved in this way: A multi-energy coupling heat pump heating system comprises a solar thermal collection system, an air source heat pump system and a water source heat pump system which are connected to a user end to form a heating circuit. The solar thermal collection system, the air source heat pump system and the water source heat pump system are provided to perform multi-energy coupling heating to ensure the heating effect of the heating system. A part of the heat energy generated by the solar thermal collection system is transferred to the user end, and a part is stored in a hot water storage tank. A part of the heat energy generated by the air source heat pump system is transferred to the user end, and a part is stored in the hot water storage tank. The hot water storage tank is provided to store excess heat energy to reduce operating consumption and improve the economic benefit of the heating system. The heat energy input end of the water source heat pump system is connected to the hot water storage tank, and the water source heat pump system transfers the heat energy in the hot 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 hot water storage tank is connected to the air source heat pump system through a second defrost pipeline. The first defrost pipeline and the second defrost pipeline are provided to ensure the stable operation of the air source heat pump system and improve the working efficiency.

[0007] Furthermore, the solar thermal collection system includes a solar thermal collector, a first liquid inlet pipeline and a first liquid return pipeline are connected between the solar thermal collector and the user end, the water medium in the solar thermal collector is supplied with heat to the user end through the first liquid inlet pipeline and the first liquid return pipeline and is circulated and reused to improve economic benefits; a valve 11 and a valve 21 are arranged on the first liquid inlet pipeline, the first liquid inlet pipeline is connected to the hot water storage tank through the first heat storage liquid inlet branch, a valve 12 is arranged on the first heat storage liquid inlet branch, and the excess heat energy in the solar thermal collector is stored in the first heat storage liquid inlet branch. In the heat storage tank, energy waste is reduced; valve ten and valve twenty-four are arranged on the first return liquid pipeline, the first return liquid pipeline is connected with the heat storage tank through the first heat storage return liquid branch, valve nine is arranged on the first heat storage return liquid branch, a circulating water pump one is arranged on the first return liquid pipeline between the heat storage tank and the solar collector, so that the water medium after storing heat energy in the heat storage tank can flow back to the solar collector quickly; a circulating water pump five is arranged on the first return liquid pipeline between the heat storage tank and the user end, so that the water medium provided with heat at the user end can flow back to the solar collector quickly, thereby improving the operation efficiency of the system.

[0008] Furthermore, the air source heat pump system includes an air-side heat exchanger, a first compressor and a user-side heat exchanger. A first compression liquid inlet pipeline and a first throttling liquid return pipeline are connected between the air-side heat exchanger and the user-side heat exchanger, so that the refrigerant circulates between the air-side heat exchanger and the user-side heat exchanger; a first compressor is provided on the first compression liquid inlet pipeline, and the refrigerant in the air-side heat exchanger is compressed into a high-pressure refrigerant by setting the first compressor, which facilitates heat exchange and improves the efficiency of heat energy transfer; a first throttling valve is provided on the first throttling liquid return pipeline, and the high-pressure refrigerant is converted into a low-pressure refrigerant by setting the first throttle valve, thereby controlling the fluid flow and ensuring the stable operation of the system; a second liquid inlet pipeline and a second liquid return pipeline are connected between the user-side heat exchanger and the user end, and the water medium in the user-side heat exchanger is heated and circulated with the user end through the second liquid inlet pipeline and the second liquid return pipeline to improve the efficiency of the medium The utilization rate is increased, and the economic cost is reduced; valve five and valve twenty are arranged on the second liquid inlet pipeline, and the second liquid inlet pipeline is connected with the hot water storage tank through the second heat storage liquid inlet branch, and valve six is ​​arranged on the second heat storage liquid inlet branch; valve twenty-three and valve seven are arranged on the second return liquid pipeline, and the second return liquid pipeline is connected with the hot water storage tank through the second heat storage liquid return branch, and valve eight is arranged on the second heat storage liquid return branch. By setting the second heat storage liquid inlet branch and the second heat storage liquid return branch, the excess heat energy in the air source heat pump is circulated in the hot water storage tank for heat exchange, thereby storing heat energy; a circulating water pump three is arranged on the second return liquid pipeline between the hot water storage tank and the user-side heat exchanger, so as to facilitate the water medium for heating at the user end to return to the user-side heat exchanger; a circulating water pump six is ​​arranged on the second return liquid pipeline between the hot water storage tank and the user end, so as to facilitate the water medium for storing heat energy in the hot water storage tank to return to the user-side heat exchanger, thereby improving work efficiency.

[0009] 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 the first defrost liquid inlet pipeline is provided with a valve one; the first return liquid pipeline is connected to the air side heat exchanger through the first defrost return liquid pipeline, and the first defrost return liquid pipeline is provided with a valve four. 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.

[0010] 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 third liquid inlet pipeline and a third liquid return pipeline are connected between the water source side heat exchanger and the hot water storage tank, so that the hot water in the hot water storage tank is circulated and exchanged in the water source side heat exchanger; a valve 17 is provided on the third liquid inlet pipeline, a valve 18 is provided on the third liquid return pipeline, and a circulating water pump 4 is provided on the third liquid return pipeline between the hot water storage tank and the water source side heat exchanger, so that the hot water can be returned to the hot water storage tank under the action of the circulating water pump 4; a second compression liquid inlet pipeline and a second throttling liquid return pipeline are connected between the water source side heat exchanger and the user side water source heat exchanger, so that the refrigerant is circulated between the water source side heat exchanger and the user side water source heat exchanger loop; a second compressor is arranged on the second compression liquid inlet pipeline to compress the refrigerant into high-pressure refrigerant, which is convenient for heat exchange and improves the efficiency of heat energy transfer; a second throttling valve is arranged on the second throttling return liquid pipeline to convert the refrigerant into low-pressure refrigerant, control the fluid flow and ensure the stable operation of the system; a fourth liquid inlet pipeline and a fourth liquid return pipeline are connected between the user-side water source heat exchanger and the user end, so that the hot water in the user-side water source heat exchanger is circulated for heating the user end; a valve twenty-five is arranged on the fourth liquid inlet pipeline, a valve twenty-six is ​​arranged on the fourth liquid return pipeline, and a circulating water pump eight is arranged on the fourth liquid return pipeline between the user-side water source heat exchanger and the user end, so that the hot water can return to the user-side water source heat exchanger after heating the user end, thereby speeding up the working rate.

[0011] Furthermore, a fifth liquid inlet pipeline and a fifth liquid return pipeline are connected between the heat storage tank and the user end, so that the hot water in the heat storage tank is circulated for heat supply at the user end; a valve 14 and a valve 19 are provided on the fifth liquid inlet pipeline, a valve 16 and a valve 22 are provided on the fifth liquid return pipeline, and a circulating water pump 7 is provided on the fifth liquid return pipeline between the heat storage tank and the user end, so that the hot water can return to the heat storage tank after heating at the user end, thereby improving work efficiency.

[0012] Furthermore, the second defrost pipeline includes a second defrost liquid inlet pipeline and a second defrost liquid return pipeline connected between the hot water storage tank and the air-side heat exchanger, the second defrost liquid inlet pipeline is provided with valve thirteen and valve two, the second defrost liquid return pipeline is provided with valve three and valve fifteen, and the second defrost liquid return pipeline between the hot water storage tank and the air-side heat exchanger is provided with a circulating water pump two. By setting the second defrost liquid inlet pipeline and the second defrost liquid return pipeline, the hot water in the hot water storage tank enters the air-side heat exchanger for defrosting and circulation, thereby ensuring stable operation of the system and improving work efficiency.

[0013] Furthermore, the 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.

[0014] 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.

[0015] A working method of a multi-energy coupling heat pump heating system, the working method of the multi-energy coupling heat pump heating system comprising a solar energy heating mode, a solar energy heat storage mode, a solar energy defrosting mode, an air source heat pump heating mode, an air source heat pump heat storage mode, a hot water storage tank heating mode, a hot water storage tank defrosting mode, and a water source heat pump heating mode.

[0016] In the solar energy heating mode, open valve 11 and valve 21, and the heat energy in the solar energy collector is supplied to the user end through the first liquid inlet pipeline; open valve 24 and valve 10, and under the action of circulating water pump 5 and circulating water pump 1, the medium that transfers heat energy returns to the solar energy collector through the first liquid return pipeline.

[0017] In the solar thermal storage mode, open valve twelve, and the excess heat energy in the solar thermal collector enters the hot water storage tank through the first heat storage liquid inlet branch for heat storage; open valve nine and valve ten, and under the action of circulating water pump one, the medium that transfers heat energy returns to the solar thermal collector through the first heat storage liquid return branch.

[0018] In the solar defrost mode, open valve one, and the medium in the solar collector enters the air side heat exchanger through the first defrost liquid inlet pipeline for defrosting; open valve four, and under the action of circulating water pump one, the medium returns to the solar collector through the first defrost liquid return pipeline.

[0019] In the air source heat pump heating mode, the medium in the air side heat exchanger passes through the first compression inlet pipeline, enters the user side heat exchanger for heat exchange under the action of the first compressor, and flows through the first throttling return pipeline through the first throttling valve and returns to the air side heat exchanger; open valve five and valve twenty, the heat energy in the user side heat exchanger enters the user end for heating through the second inlet pipeline, open valve twenty-three and valve seven, and under the action of circulating water pump three and circulating water pump six, the medium that transfers heat energy returns to the user side heat exchanger through the second return liquid pipeline.

[0020] When the air source heat pump is in heat storage mode, open valve six, and the excess heat energy in the user-side heat exchanger enters the water storage tank through the second heat storage liquid inlet branch for heat storage; open valve eight, and under the action of circulating water pump three, the medium that transfers heat energy returns to the user-side heat exchanger through the second heat storage liquid return branch.

[0021] When the water storage tank is in heating mode, open valve 14 and valve 19, and the heat energy stored in the water storage tank enters the user end through the fifth liquid inlet pipeline for heating; open valve 22 and valve 16, and under the action of circulating water pump 7, the medium that transfers heat energy returns to the water storage tank through the fifth liquid return pipeline.

[0022] When the water storage tank is in defrost mode, open valve two and valve thirteen, and the heat energy in the water storage tank enters the air side heat exchanger through the second defrost liquid inlet pipeline for defrosting; open valve three and valve fifteen, and under the action of circulating water pump two, the medium that transfers heat energy returns to the water storage tank through the second defrost liquid return pipeline.

[0023] When the water source heat pump is in heating mode, open valve seventeen, and the heat energy in the water storage tank enters the water source side heat exchanger through the third liquid inlet pipeline for heat exchange. Open valve eighteen, and under the action of the circulating water pump four, the medium returns to the water storage tank through the third return liquid pipeline; the medium in the water source side heat exchanger passes through the second compression liquid inlet pipeline, enters the user side water source heat exchanger for heat exchange under the action of the second compressor, and returns to the water source side heat exchanger through the second throttling return liquid pipeline through the second throttling valve; open valve twenty-five, and the heat energy in the user side water source heat exchanger enters the user end for heating through the fourth liquid inlet pipeline. Open valve twenty-six, and under the action of the circulating water pump eight, the medium that transfers heat energy returns to the user side water source heat exchanger through the fourth return liquid pipeline.

[0024] The beneficial effects of the present invention are: The present invention proposes a multi-energy coupling heat pump heating system and a working method thereof. A solar energy thermal collection system, an air source heat pump system and a water source heat pump system are arranged to perform multi-energy coupling heating, thereby improving the outlet water temperature of the heating system, so that the heating system will not suffer from a decrease in operating efficiency due to the intermittent and instability of some heating equipment, thereby ensuring the heating effect of the heating system; a hot water storage tank is arranged to store excess heat energy of the heating equipment, thereby reducing operating consumption and improving the economy of the heating system; a first defrost pipeline and a second defrost pipeline are arranged to ensure the stable operation of the air source heat pump system and improve working efficiency; the working method of the present invention includes different working methods including solar energy heating mode, solar energy heat storage mode, solar energy defrost mode, air source heat pump heating mode, air source heat pump heat storage mode, hot water storage tank heating mode, hot water storage tank defrost mode and water source heat pump heating mode, thereby avoiding the situation where some heating equipment cannot meet the load demand when affected by the environment, and selecting different operating modes according to actual conditions, thereby improving the service life of the system units and improving the overall economy and heating performance of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] 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.

[0026] Figure 1This is the overall working principle diagram of the multi-energy coupling heat pump heating system of the present invention; Figure 2 It is a working principle diagram of the solar energy heat collection system of the present invention; Figure 3 The working principle diagram of the air source heat pump system of the present invention; Figure 4 The working principle diagram of the water source heat pump system of the present invention; Figure 5 It is the working principle diagram of the hot water storage tank of the present invention; Figure 6 It is a schematic diagram of a first defrosting pipeline of the present invention; Figure 7 is a schematic diagram of a second defrosting pipeline of the present invention; 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; 3. Heat storage tank; 4. Water source heat pump system; 41 Water source side heat exchanger; 42. Second compressor; 43. User side water source heat exchanger; 44. Second throttle 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. Valve; 601. Valve 1; 602. Valve 2; 603. Valve 3; 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 described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] Embodiment 1, in this embodiment, as Figure 1As shown, a multi-energy coupling heat pump heating system includes a solar thermal collection system, an air source heat pump system 2 and a water source heat pump system 4 connected to a user end 7 to form a heating circuit, and heat is provided to the user end 7 through the three-energy coupling of the solar thermal collection system, the air source heat pump system 2 and the water source heat pump system 4; a part of the heat energy generated by the solar thermal collection system is transferred to the user end 7, and a part is stored in the hot water storage tank 3, and the excess heat energy after the solar thermal collection system heats the user end 7 is stored in the hot water storage tank 3; a part of the heat energy generated by the air source heat pump system 2 is transferred to the user end 7, and a part is stored in the hot water storage tank 3 The excess heat energy after the air source heat pump system 2 supplies heat to the user end 7 is also stored in the hot water storage tank 3; the heat energy input end of the water source heat pump system 4 is connected to the hot water storage tank 3, and the hot water storage tank 3 serves as the heat source of the water source heat pump system 4; the water source heat pump system 4 transfers the heat energy in the hot 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 hot water storage tank 3 is connected to the air source heat pump system 2 through the second defrost pipeline, the solar thermal collection system and the hot water storage tank 3 can respectively defrost the air source heat pump system 2 to prevent the air source heat pump system 2 from stopping working after freezing.

[0029] Based on the above implementation, as a preferred implementation, Figure 2 As shown, the solar thermal collection system includes a solar thermal collector 1. Preferably, the medium in the solar thermal collector 1 in the solar thermal collection system is a water medium. The solar thermal collector 1 heats the water medium and transfers heat energy in the form of hot water. 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. The hot water in the solar thermal collector 1 enters the user end 7 through the first liquid inlet pipeline for heating. The first liquid inlet pipeline is connected to the hot water storage tank 3 through a first heat storage liquid inlet branch. A valve 12 612 is provided on the first heat storage liquid inlet branch. The excess heat energy in the solar thermal collector 1 enters the hot water storage tank 3 through the first heat storage liquid inlet branch and is connected to the hot water storage tank 3. The medium in the hot water storage tank 3 exchanges heat to store thermal energy; a valve ten 610 and a valve twenty-four 624 are provided on the first return liquid pipeline; the first return liquid pipeline is connected to the hot water storage tank 3 through the first heat storage return liquid branch, and a valve nine 609 is provided on the first heat storage return liquid branch. A circulating water pump one 51 is provided on the first return liquid pipeline between the hot water storage tank 3 and the solar thermal collector 1. After heat exchange in the hot water storage tank 3, the hot water passes through the first heat storage return liquid branch and returns to the solar thermal collector 1 under the action of the circulating water pump five 55; a circulating water pump five 55 is provided on the first return liquid pipeline between the hot water storage tank 3 and the user end 7. After heat exchange at the user end 7, the hot water passes through the first return liquid pipeline and returns to the solar thermal collector 1 under the action of the circulating water pump one 51 for re-collection.

[0030] Based on the above implementation, as a preferred implementation, Figure 3 As 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, in the air source heat pump system 2, 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 first compression liquid inlet pipeline and a first throttling liquid return pipeline are connected between the air side heat exchanger 21 and the user side heat exchanger 23, and a first compressor 22 is arranged on the first compression liquid inlet pipeline. The refrigerant in the air side heat exchanger 21 exchanges heat with the outdoor air through the first compression liquid return pipeline. The liquid pipeline flows through the first compressor 22 and enters the user-side heat exchanger 23 in the form of high temperature and high pressure for heat exchange. The first throttling return liquid pipeline is provided with a first throttling valve 24. After the refrigerant enters the user-side heat exchanger 23 for heat exchange, it passes through the first throttling return liquid pipeline and flows through the first throttling valve 24, and returns to the air-side heat exchanger 21 in the form of low temperature and low pressure to exchange heat with the outside again; the second liquid inlet pipeline and the second liquid return pipeline are connected between the user-side heat exchanger 23 and the user end 7, and the second liquid inlet pipeline is provided with a valve five 605 and a valve twenty 620 , the water medium in the user-side heat exchanger 23 is heated and enters the user end 7 through the second liquid inlet pipeline for heating; the second liquid inlet pipeline is connected to the hot water storage tank 3 through the second heat storage liquid inlet branch, and a valve six 606 is provided on the second heat storage liquid inlet branch. The excess heat energy in the user-side heat exchanger 23 enters the hot water storage tank 3 through the second heat storage liquid inlet branch for storage; a valve twenty-three 623 and a valve seven 607 are provided on the second return liquid pipeline, and the second return liquid pipeline is connected to the hot water storage tank 3 through the second heat storage return liquid branch, and a valve twenty-three 623 and a valve seven 607 are provided on the second heat storage return liquid branch. Valve eight 608; a circulating water pump three 53 is provided on the second return liquid pipeline between the hot water storage tank 3 and the user-side heat exchanger 23. After the water medium stores heat energy in the hot water storage tank 3, it passes through the second heat storage return liquid branch and returns to the user-side heat exchanger 23 under the action of the circulating water pump three 53; a circulating water pump six 56 is provided on the second return liquid pipeline between the hot water storage tank 3 and the user end 7. After the water medium provides heat in the user end 7, it passes through the second return liquid pipeline and returns to the user-side heat exchanger 23 under the action of the circulating water pump three 53 and the circulating water pump six 56.

[0031] Based on the above implementation, as a preferred implementation, 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 of the water source heat pump system 4 is a refrigerant, and the medium in the user side water source heat exchanger 43 is a water medium; a third liquid inlet pipeline and a third liquid return pipeline are connected between the water source side heat exchanger 41 and the hot water storage tank 3, a valve 17 617 is provided on the third liquid inlet pipeline, the water source side heat exchanger 41 is connected to the hot water storage tank 3 for heat exchange, and the medium in the hot water storage tank 3 The medium enters the water source side heat exchanger 41 through the third liquid inlet pipeline for heat exchange; a valve 18 618 is provided on the third liquid return pipeline, and a circulating water pump 4 54 is provided on the third liquid return pipeline between the hot water storage tank 3 and the water source side heat exchanger 41. After the medium exchanges heat in the water source side heat exchanger 41, it passes through the third liquid return pipeline and returns to the hot water storage tank 3 under the action of the circulating water pump 4 54; a second compression liquid inlet pipeline and a second throttling liquid return pipeline are connected between the water source side heat exchanger 41 and the user side water source heat exchanger 43, and the second compression liquid inlet pipeline A second compressor 42 is provided on the heat exchanger 41 on the water source side. After the refrigerant in the water source side heat exchanger 41 is heated, it flows through the second compressor 42 through the second compression liquid inlet pipeline, and enters the user side water source heat exchanger 43 in the form of high temperature and high pressure for heat exchange; a second throttling return liquid pipeline is provided with a second throttling valve 44. After the refrigerant exchanges heat in the user side water source heat exchanger 43, it flows through the second throttling return liquid pipeline through the second throttling valve 44, and returns to the water source side heat exchanger 41 in the form of low temperature and low pressure; the user side water source heat exchanger 43 is connected to the user end 7. There is a fourth liquid inlet pipeline and a fourth liquid return pipeline. The fourth liquid inlet pipeline is provided with a valve twenty-five 625, and the fourth liquid return pipeline is provided with a valve twenty-six 626. After the water medium in the user-side water source heat exchanger 43 is heated, it enters the user end 7 through the fourth liquid inlet pipeline for heating; a circulating water pump eight 58 is provided on the fourth liquid return pipeline between the user-side water source heat exchanger 43 and the user end 7. After the water medium is heated in the user end 7, it passes through the fourth liquid return pipeline and returns to the user-side water source heat exchanger 43 under the action of the circulating water pump eight 58.

[0032] Embodiment 2 is further optimized on the basis of embodiment 1, such as Figure 5 As shown, a fifth liquid inlet pipeline and a fifth liquid return pipeline are connected between the hot water storage tank 3 and the user end 7. Preferably, the medium in the hot water storage tank 3 is a water medium; a valve fourteen 614 and a valve nineteen 619 are provided on the fifth liquid inlet pipeline, and the heat energy stored in the hot water storage tank 3 directly enters the user end 7 in the form of hot water through the fifth liquid inlet pipeline for heating; a valve sixteen 616 and a valve twenty-two 622 are provided on the fifth liquid return pipeline, and a circulating water pump seven 57 is provided on the fifth liquid return pipeline between the hot water storage tank 3 and the user end 7. After providing heating in the user end 7, the hot water passes through the fifth liquid return pipeline and returns to the hot water storage tank 3 under the action of the circulating water pump seven 57.

[0033] Embodiment 3 is further optimized on the basis of embodiment 1, such as Figure 6 As shown, 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. A valve 601 is provided on the first defrost liquid inlet pipeline. The water medium in the solar thermal collector 1 enters the air side heat exchanger 21 in the form of hot water through the first defrost liquid 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 liquid pipeline is connected to the air side heat exchanger 21 through the first defrost return liquid pipeline. A valve 604 is provided on the first defrost return liquid pipeline. After being defrosted in the air side heat exchanger 21, the hot water enters the first return liquid pipeline through the first defrost return liquid pipeline and returns to the solar thermal collector 1 under the action of the circulating water pump 51.

[0034] Based on the above implementation, as a preferred implementation, Figure 7 As shown, the second defrost pipeline includes a second defrost liquid inlet pipeline and a second defrost liquid return pipeline connected between the hot water tank 3 and the air-side heat exchanger 21. A valve thirteen 613 and a valve two 602 are provided on the second defrost liquid inlet pipeline. The heat energy stored in the hot water tank 3 enters the air-side heat exchanger 21 in the form of hot water through the second defrost liquid 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 liquid return pipeline. A circulating water pump two 52 is provided on the second defrost liquid return pipeline between the hot water tank 3 and the air-side heat exchanger 21. After being defrosted in the air-side heat exchanger 21, the hot water passes through the second defrost liquid return pipeline and returns to the hot water tank 3 under the action of the circulating water pump two 52.

[0035] A working method of a multi-energy coupled heat pump heating system includes multiple working modes, wherein the working modes include solar heating mode, solar heat storage mode, solar defrosting mode, air source heat pump heating mode, air source heat pump heat storage mode, hot water storage tank heating mode, hot water storage tank defrosting mode, and water source heat pump heating mode.

[0036] In the solar energy heating mode, open valve eleven 611 and valve twenty-one 621, and the heat energy in the solar energy collector 1 is used to heat the user end 7 through the first liquid inlet pipeline; open valve twenty-four 624 and valve ten 610, and under the action of circulating water pump five 55 and circulating water pump one 51, the water medium that transmits heat energy returns to the solar energy collector 1 through the first liquid return 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 hot water storage tank 3 through the first thermal 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 thermal storage liquid return branch.

[0038] In the solar defrost mode, open valve 1 601, and the heat energy in the solar collector 1 enters the air side heat exchanger 21 for defrosting through the first defrost liquid inlet pipeline, and the water medium that transfers heat energy flows in the coil of the air side heat exchanger 21 to melt 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 passes through the first compression liquid inlet pipeline. Under the action of the first compressor 22, it is compressed into high-temperature and high-pressure refrigerant. The high-temperature and high-pressure refrigerant enters the user side heat exchanger 23 for heat exchange, and flows through the first throttling return liquid pipeline through the first throttling valve 24, and returns to the air side heat exchanger 21 in the form of low temperature and low pressure to exchange heat with the outdoor air again; open valve five 605 and valve twenty 620, and the heat energy in the user side heat exchanger 23 enters the user end for heating through the second liquid inlet pipeline. Open valve twenty-three 623 and valve seven 607, and under the action of circulating water pump three 53 and circulating water pump six 56, the water medium that transfers heat energy returns to the user side heat exchanger 23 through the second return liquid pipeline.

[0040] When the air source heat pump is in heat storage mode, open valve six 606, and the excess heat energy in the user-side heat exchanger 23 enters the hot water storage tank 3 for heat storage through the second heat storage liquid inlet branch; open valve eight 608, and under the action of the circulating water pump three 53, the water medium that transfers heat energy returns to the user-side heat exchanger 23 through the second heat storage liquid return branch.

[0041] When the water storage tank is in heating mode, open valve fourteen 614 and valve nineteen 619, and the heat energy stored in the water storage tank 3 enters the user end 7 through the fifth liquid inlet pipeline for heating; open valve twenty-two 622 and valve sixteen 616, and under the action of circulating water pump seven 57, the water medium that transmits heat energy returns to the water storage tank 3 through the fifth liquid return pipeline.

[0042] When the water storage tank is in defrosting mode, open valve two 602 and valve thirteen 613, and the heat energy in the water storage tank 3 enters the air side heat exchanger 21 through the second defrost liquid inlet pipeline for defrosting, and the water medium that transfers heat energy flows in the coil of the air side heat exchanger 21 to melt 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 water storage tank 3 through the second defrost liquid return pipeline.

[0043] When the water source heat pump is in heating mode, valve seventeen 617 is opened, and the heat energy in the water storage tank 3 enters the water source side heat exchanger 41 through the third 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 water storage tank 3 through the third return liquid pipeline; the refrigerant in the water source side heat exchanger 41 passes through the second compression liquid inlet pipeline, and under the action of the second compressor 42, the refrigerant enters the user side water source heat exchanger 43 in the form of high temperature and high pressure for heat exchange, and flows through the second throttling valve 44 through the second throttling return liquid pipeline, and the refrigerant returns to the water source side heat exchanger 41 in the form of low temperature and low pressure; valve twenty-five 625 is opened, and the heat energy in the user side water source heat exchanger 43 enters the user end 7 through the fourth liquid inlet pipeline for heating, and valve twenty-six 626 is opened. Under the action of the circulating water pump eight 58, the water medium that transfers heat energy returns to the user side water source heat exchanger 43 through the fourth return liquid pipeline.

[0044] The method of use of the present invention is: According to outdoor environmental conditions and load requirements, different operation modes are switched by adjusting the flow of the valve 6 and the circulating water pump 5 .

[0045] 1. When the solar radiation intensity is high during the day and the user-side load demand matches, the solar heating mode is operated.

[0046] 2. When the solar radiation intensity is high during the day and the user-side load demand is low, operate the solar heating mode + solar heat storage mode.

[0047] 3. When the outdoor air temperature is high and the user-side load demand is high, operate the air source heat pump heating mode.

[0048] 4. 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.

[0049] 5. During the day, when the solar radiation intensity is low, the outdoor air temperature is high, and the user-side load demand is high, operate the solar heating mode + air source heat pump heating mode.

[0050] 6. During the day, when the solar radiation intensity is low, the outdoor air temperature is low, and the user-side load demand is high, the solar heating mode + air source heat pump heating mode + hot water tank heating mode will be operated.

[0051] 7. The solar energy system stops operating at night or on rainy days, that is, the solar heating mode and solar heat storage mode stop operating. When the outdoor air temperature is high, the operating mode is the same as working methods 3 and 4.

[0052] 8. 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 + hot water storage tank heating mode.

[0053] 9. At night or on rainy days, when the outdoor air temperature is extremely low, operate the hot water tank heating mode.

[0054] 10. At night or on rainy days, when the outdoor air temperature is extremely low and the user-side load demand is high, operate the hot water tank heating mode + water source heat pump heating mode.

[0055] 11. 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 stop running.

[0056] 12. For the air source heat pump system, when the outdoor air temperature is extremely low for a long time, the air source heat pump stops running. If the outdoor air temperature fluctuates throughout the day and the air source heat pump system needs to be defrosted, run the solar defrost mode and the hot water storage tank defrost mode. At night or on rainy days, run the hot water storage tank defrost mode.

[0057] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

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

2. The multi-energy coupling heat pump heating system according to claim 1, Features: The solar thermal collection system comprises a solar thermal collector (1), wherein a first liquid inlet pipeline and a first liquid return pipeline are connected between the solar thermal collector (1) and a 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 a hot water storage tank (3) via a first heat storage liquid inlet branch, and a valve twelve (612) is provided on the first heat storage liquid inlet branch; 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 hot water storage tank (3) via a first heat storage liquid return branch, and a valve nine (609) is provided on the first heat storage liquid return branch; a circulating water pump one (51) is provided on the first liquid return pipeline between the 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 hot water storage tank (3) and the user end (7).

3. The multi-energy coupling heat pump heating system according to claim 2, Features: 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 first compression liquid inlet pipeline and a first throttling liquid return pipeline are connected between the air side heat exchanger (21) and the user side heat exchanger (23); the first compression liquid inlet pipeline is provided with a first compressor (22); and the first throttling liquid return pipeline is provided with a first throttling valve (24); a second liquid inlet pipeline and a second 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 (620) are provided on the second liquid inlet pipeline; and a valve five (605) and a valve twenty (620) are provided on the second liquid inlet pipeline. The liquid pipeline is connected to the hot water storage tank (3) through a second heat storage liquid inlet branch, and a valve six (606) is provided on the second heat storage liquid inlet branch; a valve seven (607) and a valve twenty-three (623) are provided on the second return liquid pipeline, the second return liquid pipeline is connected to the hot water storage tank (3) through the second heat storage liquid return branch, and a valve eight (608) is provided on the second heat storage liquid return branch; a circulating water pump three (53) is provided on the second return liquid pipeline between the hot water storage tank (3) and the user-side heat exchanger (23), and a circulating water pump six (56) is provided on the second return liquid pipeline between the hot water storage tank (3) and the user end (7).

4. The multi-energy coupling heat pump heating system according to claim 3, Features: The first defrost pipeline comprises 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) via 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) via the first defrost liquid return pipeline, and a valve four (604) is provided on the first defrost liquid return pipeline.

5. The multi-energy coupling heat pump heating system according to claim 1, Features: The water source heat pump system (4) comprises a water source side heat exchanger (41), a second compressor (42) and a user side water source heat exchanger (43); a third liquid inlet pipeline and a third liquid return pipeline are connected between the water source side heat exchanger (41) and the hot water storage tank (3); a valve 17 (617) is provided on the third liquid inlet pipeline, a valve 18 (618) is provided on the third liquid return pipeline, and a circulating water pump 4 (54) is provided on the third liquid return pipeline between the hot water storage tank (3) and the water source side heat exchanger (41); the water source side heat exchanger (41) and the user side water source heat exchanger (43) are connected to each other. ) are connected between the user side water source heat exchanger (43) and the user end (7), a second compression liquid inlet pipeline and a second throttling liquid return pipeline are provided, a second compressor (42) is provided on the second compression liquid inlet pipeline, and a second throttling valve (44) is provided on the second throttling liquid return pipeline; a fourth liquid inlet pipeline and a fourth 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 fourth liquid inlet pipeline, a valve twenty-six (626) is provided on the fourth liquid return pipeline, and a circulating water pump eight (58) is provided on the fourth liquid return pipeline between the user side water source heat exchanger (43) and the user end (7).

6. The multi-energy coupling heat pump heating system according to any one of claims 1 to 5, Features: A fifth liquid inlet pipeline and a fifth liquid return pipeline are connected between the hot water storage tank (3) and the user end (7); a valve fourteen (614) and a valve nineteen (619) are provided on the fifth liquid inlet pipeline; a valve sixteen (616) and a valve twenty-two (622) are provided on the fifth liquid return pipeline; and a circulating water pump seven (57) is provided on the fifth liquid return pipeline between the hot water storage tank (3) and the user end (7).

7. The multi-energy coupling heat pump heating system according to claim 6, Features: The second defrost pipeline comprises a second defrost liquid inlet pipeline and a second defrost liquid return pipeline connected between the hot water storage tank (3) and the air-side heat exchanger (21); a valve two (602) and a valve thirteen (613) are provided on the second defrost liquid inlet pipeline; a valve three (603) and a valve fifteen (615) are provided on the second defrost liquid return pipeline; and a circulating water pump two (52) is provided on the second defrost liquid return pipeline between the hot water storage tank (3) and the air-side heat exchanger (21).

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

9. The multi-energy coupling heat pump heating system according to claim 8, Features: The exhaust device is an exhaust valve, and the water replenishing device is a water replenishing valve, and the water replenishing valve is connected to a tap water pipe.

10. A working method of the multi-energy coupling heat pump heating system according to claim 1, Features: The working method includes solar heating mode, solar heat storage mode, solar defrosting mode, air source heat pump heating mode, air source heat pump heat storage mode, hot water storage tank heating mode, hot water storage tank defrosting mode, water source heat pump heating mode; In the solar energy heating mode, valve eleven (611) and valve twenty-one (621) are opened, and the medium in the solar energy collector (1) is supplied with heat to the user end (7) through the first liquid inlet pipeline; valve ten (610) and valve twenty-four (624) are opened, and under the action of circulating water pump one (51) and circulating water pump five (55), the medium is returned to the solar energy collector (1) through the first liquid return pipeline; In the solar thermal storage mode, valve twelve (612) is opened, and the excess heat energy in the solar thermal collector (1) enters the hot water storage tank (3) through the first heat storage liquid inlet branch for heat storage; valve nine (609) and valve ten (610) are opened, and under the action of the circulating water pump one (51), the medium returns to the solar thermal collector (1) through the first heat storage liquid return branch; In the solar defrosting mode, valve one (601) is opened, and the medium in the solar thermal collector (1) enters the air side heat exchanger (21) through the first defrosting liquid inlet pipeline for defrosting; valve four (604) is opened, and under the action of circulating water pump one (51), the medium returns to the solar thermal collector (1) through the first defrosting liquid return pipeline; In the air source heat pump heating mode, the medium in the air side heat exchanger (21) passes through the first compression liquid inlet pipeline and enters the user side heat exchanger (23) for heat exchange under the action of the first compressor (22), and flows through the first throttling return liquid pipeline through the first throttling valve (24) and returns to the air side heat exchanger (21); valve five (605) and valve twenty (620) are opened, and the heat energy in the user side heat exchanger (23) enters the user end for heating through the second liquid inlet pipeline; valve seven (607) and valve twenty-three (623) are opened, and under the action of circulating water pump three (53) and circulating water pump six (56), the medium returns to the user side heat exchanger (23) through the second return liquid pipeline; When the air source heat pump is in heat storage mode, valve six (606) is opened, and the excess heat energy in the user-side heat exchanger (23) enters the water storage tank (3) through the second heat storage liquid inlet branch for heat storage; valve eight (608) is opened, and under the action of circulating water pump three (53), the medium returns to the user-side heat exchanger (23) through the second heat storage liquid return branch; When the water storage tank is in heating mode, valve fourteen (614) and valve nineteen (619) are opened, and the heat energy stored in the water storage tank (3) enters the user end (7) through the fifth liquid inlet pipeline for heating; valve sixteen (616) and valve twenty-two (622) are opened, and under the action of circulating water pump seven (57), the medium returns to the water storage tank (3) through the fifth liquid return pipeline; When the hot water storage tank is in defrosting mode, valve two (602) and valve thirteen (613) are opened, and the heat energy in the hot water storage tank (3) enters the air-side heat exchanger (21) through the second defrosting liquid inlet pipeline for defrosting; valve three (603) and valve fifteen (615) are opened, and under the action of circulating water pump two (52), the medium returns to the hot water storage tank (3) through the second defrosting liquid return pipeline; When the water source heat pump is in heating mode, valve seventeen (617) is opened, and the heat energy in the water storage tank (3) enters the water source side heat exchanger (41) through the third liquid inlet pipeline for heat exchange. Valve eighteen (618) is opened, and under the action of circulating water pump four (54), the medium returns to the water storage tank (3) through the third liquid return pipeline; the medium in the water source side heat exchanger (41) enters the user side water source heat exchanger (43) through the second compression liquid inlet pipeline and under the action of the second compressor (42) for heat exchange, and returns to the water source side heat exchanger (41) through the second throttling return liquid pipeline through the second throttling valve (44); valve twenty-five (625) is opened, and the heat energy in the user side water source heat exchanger (43) enters the user end (7) through the fourth liquid inlet pipeline for heating. Valve twenty-six (626) is opened, and under the action of circulating water pump eight (58), the medium returns to the user side water source heat exchanger (43) through the fourth liquid return pipeline.

Images