Multi-energy coupling heat pump heat supply system

Abstract

The utility model discloses a multi-energy coupling heat pump heat supply system which 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, and multi-energy coupling heat supply is carried out by arranging the solar heat collection system, the air source heat pump system and the water source heat pump system. The heat supply effect of the heat supply system is ensured; 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 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 storage water tank is arranged to store redundant heat energy, operation consumption is reduced, and the economic benefits of the heat supply system are improved; 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. And by arranging the first defrosting pipeline and the second defrosting pipeline, stable operation of the air source heat pump system is guaranteed, and the working efficiency is improved.

Description

Technical Field

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

[0002] As a technology for efficiently utilizing environmental heat energy, the combination of solar energy and air source heat pump provides a new idea for energy conservation and emission reduction in heating systems. However, the solar energy and air source heat pump coupling system still has the problem of being restricted by environmental conditions, with a limited scope of application. The existing technical solutions have a complex system structure and a large investment. The patented technology rationally utilizes solar energy, air source heat pump and heat storage technology to achieve complementary advantages, with a wide range of system applicability. It can operate under different weather conditions, realizing all-weather operation and energy-saving effects, improving the comprehensive energy utilization efficiency, and reducing the investment cost of the heating system.

[0003] For example, Chinese Patent No. CN202320371559 discloses a multi-energy coupling heating system, which includes a heating return water pipeline, a main heating device, a buffer water tank and a heating supply water pipeline connected in sequence. The main heating device can heat the water body transported from the heating return water pipeline to the buffer water tank. A first valve for controlling the water flow is provided between the heating return water pipeline and the main heating device; an auxiliary heating device is connected to the buffer water tank. A first auxiliary heating pipeline is provided between the heating return water pipeline and the buffer water tank. The first auxiliary heating pipeline is arranged in parallel with the first valve. A second valve for controlling the water flow is provided on the first auxiliary heating pipeline; an energy storage device is also connected to the buffer water tank. An energy storage branch and a first return 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 return branch and the buffer water tank are connected in sequence to form an energy storage loop. A third valve for controlling the water flow is provided on the energy storage branch.

[0004] The heating system described in the above patent ensures the heating effect of the heating system, ensures the economy of the heating system, and at the same time improves the efficiency, safety and stability of the heating system, solving the technical problems of high investment cost, high operation cost and unstable system in the existing multi-energy complementary heating system, but it cannot solve the problems of single working mode, being restricted by environmental conditions and limited scope of application in the existing multi-energy coupling heating system. Summary of the Utility Model

[0005] In view of the above deficiencies in the background art, the utility model proposes a multi-energy coupling heat pump heating system, which solves the problems of single working mode, still being restricted by environmental conditions and limited scope of application in the existing multi-energy coupling system.

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

[0007] A multi-energy coupled heat pump heating system includes a solar collector system, an air source heat pump system, and a water source heat pump system that are connected to the user end to form a heating circuit. By setting up the solar collector system, the air source heat pump system, and the water source heat pump system for multi-energy coupled heating, the heating effect of the heating system is ensured; part of the heat energy generated by the solar collector system is transferred to the user end and part is stored in the hot water storage tank; part of the heat energy generated by the air source heat pump system is transferred to the user end and part is stored in the hot water storage tank; by setting up the hot water storage tank to store the excess heat energy, the operation consumption is reduced and the economic benefit of the heating system is improved; 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 collector system and the air source heat pump system are connected through a first defrosting pipeline, and the hot water storage tank and the air source heat pump system are connected through a second defrosting pipeline. By setting up the first defrosting pipeline and the second defrosting pipeline, the stable operation of the air source heat pump system is ensured and the working efficiency is improved.

[0008] Further, the solar collector system includes a solar collector. A first liquid inlet pipeline and a first liquid return pipeline are connected between the solar collector and the user end. The water medium in the solar collector supplies heat to the user end through the first liquid inlet pipeline and the first liquid return pipeline and circulates, which is reused to improve the economic benefit; a valve eleven and a valve twenty-one are provided on the first liquid inlet pipeline. The first liquid inlet pipeline is connected to the hot water storage tank through a first heat storage liquid inlet branch, and a valve twelve is provided on the first heat storage liquid inlet branch. The excess heat energy in the solar collector is stored in the hot water storage tank through the first heat storage liquid inlet branch, reducing energy waste; a valve ten and a valve twenty-four are provided on the first liquid return pipeline. The first liquid return pipeline is connected to the hot water storage tank through a first heat storage liquid return branch, and a valve nine is provided on the first heat storage liquid return branch. A circulation pump one is provided on the first liquid return pipeline between the hot water storage tank and the solar collector to facilitate the rapid flow of the water medium after storing heat energy in the hot water storage tank back to the solar collector; a circulation pump five is provided on the first liquid return pipeline between the hot water storage tank and the user end to facilitate the rapid flow of the water medium for heating the user end back to the solar collector, improving the system operation efficiency.

[0009] 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, enabling the refrigerant to circulate between the air-side heat exchanger and the user-side heat exchanger. The first compression liquid inlet pipeline is provided with the first compressor. By setting the first compressor, the refrigerant in the air-side heat exchanger is compressed into high-pressure refrigerant, facilitating heat exchange and improving the heat energy transfer efficiency. The first throttling liquid return pipeline is provided with a first throttling valve. By setting the first throttling valve, the high-pressure refrigerant becomes low-pressure refrigerant, controlling the fluid flow rate 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. After obtaining heat, the water medium in the user-side heat exchanger conducts a heating cycle with the user end through the second liquid inlet pipeline and the second liquid return pipeline, improving the utilization rate of the medium and reducing the economic cost. The second liquid inlet pipeline is provided with Valve Five and Valve Twenty. The second liquid inlet pipeline is connected to the heat storage water tank through a second heat storage liquid inlet branch, and a Valve Six is provided on the second heat storage liquid inlet branch. The second liquid return pipeline is provided with Valve Twenty-Three and Valve Seven. The second liquid return pipeline is connected to the heat storage water tank through a second heat storage liquid return branch, and a Valve Eight is provided 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 and exchanged in the heat storage water tank to store heat energy. A Circulation Pump Three is provided on the second liquid return pipeline between the heat storage water tank and the user-side heat exchanger, facilitating the return of the water medium heated at the user end to the user-side heat exchanger. A Circulation Pump Six is provided on the second liquid return pipeline between the heat storage water tank and the user end, facilitating the return of the water medium storing heat energy in the heat storage water tank to the user-side heat exchanger and improving the working efficiency.

[0010] Furthermore, the first defrosting pipeline includes a first defrosting liquid inlet pipeline and a first defrosting liquid return pipeline. The first liquid inlet pipeline is connected to the air-side heat exchanger through the first defrosting liquid inlet pipeline, and a Valve One is provided on the first defrosting liquid inlet pipeline. The first liquid return pipeline is connected to the air-side heat exchanger through the first defrosting liquid return pipeline, and a Valve Four is provided on the first defrosting liquid return pipeline. By setting the first defrosting liquid inlet pipeline and the first defrosting liquid return pipeline, the hot water in the solar collector circulates between the solar collector and the air-side heat exchanger, facilitating defrosting of the air-side heat exchanger, preventing the air-side heat exchanger from freezing, and improving the working efficiency.

[0011] Further, 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, enabling the hot water in the hot water storage tank to circulate and exchange heat in the water source side heat exchanger. A valve No. 17 is provided on the third liquid inlet pipeline, and a valve No. 18 is provided on the third liquid return pipeline. A circulation pump No. 4 is provided on the third liquid return pipeline between the hot water storage tank and the water source side heat exchanger, facilitating the return of the hot water to the hot water storage tank under the action of the circulation pump No. 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, enabling the refrigerant to circulate between the water source side heat exchanger and the user side water source heat exchanger. A second compressor is provided on the second compression liquid inlet pipeline to compress the refrigerant into a high-pressure refrigerant, facilitating heat exchange and improving the heat transfer efficiency. A second throttling valve is provided on the second throttling liquid return pipeline to turn the refrigerant into a low-pressure refrigerant, controlling the fluid flow rate and ensuring 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, enabling the hot water in the user side water source heat exchanger to provide a heating cycle for the user end. A valve No. 25 is provided on the fourth liquid inlet pipeline, and a valve No. 26 is provided on the fourth liquid return pipeline. A circulation pump No. 8 is provided on the fourth liquid return pipeline between the user side water source heat exchanger and the user end, facilitating the return of the hot water to the user side water source heat exchanger after heating the user end and accelerating the working rate.

[0012] Further, a fifth liquid inlet pipeline and a fifth liquid return pipeline are connected between the hot water storage tank and the user end, enabling the hot water in the hot water storage tank to provide a heating cycle in the user end. A valve No. 14 and a valve No. 19 are provided on the fifth liquid inlet pipeline, a valve No. 16 and a valve No. 22 are provided on the fifth liquid return pipeline, and a circulation pump No. 7 is provided on the fifth liquid return pipeline between the hot water storage tank and the user end, facilitating the return of the hot water to the hot water storage tank after heating the user end and improving the working efficiency.

[0013] Further, the second defrosting pipeline includes a second defrosting liquid inlet pipeline and a second defrosting liquid return pipeline connected between the hot water storage tank and the air side heat exchanger. A valve No. 13 and a valve No. 2 are provided on the second defrosting liquid inlet pipeline, a valve No. 3 and a valve No. 15 are provided on the second defrosting liquid return pipeline, and a circulation pump No. 2 is provided on the second defrosting liquid return pipeline between the hot water storage tank and the air side heat exchanger. By providing the second defrosting liquid inlet pipeline and the second defrosting liquid return pipeline, the hot water in the hot water storage tank enters the air side heat exchanger for defrosting and circulates, ensuring the stable operation of the system and improving the working efficiency.

[0014] Further, an exhaust device and a water replenishing device are provided on the hot water storage tank. 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 to the hot water storage tank, continuously supplies water, and improves the working efficiency.

[0015] Further, the exhaust device is an exhaust valve, which has a simple structure and is convenient for stabilizing the pressure. The water replenishing device is a water replenishing valve, and the water replenishing valve is connected to a water supply pipe, which can quickly and conveniently replenish water source for the hot water storage tank.

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

[0017] The present utility model provides a multi-energy coupling heat pump heating system. By setting up a solar heat collection system, an air source heat pump system and a water source heat pump system for multi-energy coupling heating, the outlet water temperature of the heating system is increased, so that the heating system will not have a decrease in operating efficiency due to the intermittency and instability of some heating equipment, and the heating effect of the heating system is ensured; by setting up a hot water storage tank to store the excess heat energy of the heating equipment, the operation consumption is reduced, and the economy of the heating system is improved; by setting up a first defrosting pipeline and a second defrosting pipeline, the stable operation of the air source heat pump system is ensured, and the working efficiency is improved; the present utility model is provided with different working modes such as 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, which avoids the situation that the demand of the load cannot be met when some heating equipment is affected by the environment, selects different operation modes according to the actual situation, improves the service life of the system unit, and improves the overall economy and heating performance of the system. Description of the Drawings

[0018] In order to more clearly illustrate the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

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

[0020] Figure 2 It is the working principle diagram of the solar heat collection system of the present utility model;

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

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

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

[0024] Figure 6 It is the schematic diagram of the first defrosting pipeline of the present utility model;

[0025] Figure 7 Schematic diagram of the second defrosting pipeline of the present utility model;

[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; 3. Hot water 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. Circulation water pump; 51. Circulation water pump one; 52. Circulation water pump two; 53. Circulation water pump three; 54. Circulation water pump four; 55. Circulation water pump five; 56. Circulation water pump six; 57. Circulation water pump seven; 6. Valve; 601. Valve one; 602. Valve two; 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. Specific embodiments

[0027] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0028] Embodiment 1. In this embodiment, as Figure 1As shown in the figure, a multi-energy coupled heat pump heating system includes a solar collector system, an air source heat pump system 2, and a water source heat pump system 4 that are connected to the user end 7 to form a heating circuit. The three energies of the solar collector system, the air source heat pump system 2, and the water source heat pump system 4 are coupled to heat the user end 7. A part of the heat energy generated by the solar collector system 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 solar collector 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 heats 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 collector system and the air source heat pump system 2 are connected through a first defrosting pipeline, and the hot water storage tank 3 and the air source heat pump system 2 are connected through a second defrosting pipeline. The solar collector 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 freezing and stopping working.

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

[0030] On the basis of the above embodiment, as a preferred embodiment, asFigure 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 inlet pipeline and a first throttling return pipeline are connected between the air side heat exchanger 21 and the user side heat exchanger 23. The first compressor 22 is provided on the first compression inlet pipeline. The refrigerant in the air side heat exchanger 21 exchanges heat with the outside and then flows through the first compressor 22 through the first compression inlet pipeline, and enters the user side heat exchanger 23 for heat exchange in a high-temperature and high-pressure form. A first throttling valve 24 is provided on the first throttling return pipeline. After the refrigerant enters the user side heat exchanger 23 for heat exchange, it passes through the first throttling return pipeline and flows through the first throttling valve 24, and returns to the air side heat exchanger 21 to exchange heat with the outside again in a low-temperature and low-pressure form; a second inlet pipeline and a second 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 inlet pipeline. The water medium in the user side heat exchanger 23 obtains heat and then enters the user end 7 for heating through the second inlet pipeline; the second inlet pipeline is communicated with the heat storage water tank 3 through a second heat storage inlet branch. A valve six 606 is provided on the second heat storage inlet branch. The excess heat energy in the user side heat exchanger 23 enters the heat storage water tank 3 through the second heat storage inlet branch for storage; a valve twenty-three 623 and a valve seven 607 are provided on the second return pipeline. The second return pipeline is communicated with the heat storage water tank 3 through a second heat storage return branch. A valve eight 608 is provided on the second heat storage return branch; a circulation pump three 53 is provided on the second return pipeline between the heat storage water tank 3 and the user side heat exchanger 23. After the water medium stores heat energy in the heat storage water tank 3, it returns to the user side heat exchanger 23 through the second heat storage return branch and under the action of the circulation pump three 53; a circulation pump six 56 is provided on the second return pipeline between the heat storage water tank 3 and the user end 7. After the water medium provides heat in the user end 7, it returns to the user side heat exchanger 23 through the second return pipeline and under the action of the circulation pump three 53 and the circulation pump six 56.

[0031] On the basis of the above embodiment, as a preferred embodiment, as 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 No. 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. The medium in the hot water storage tank 3 enters the water source side heat exchanger 41 through the third liquid inlet pipeline for heat exchange. A valve No. 18 618 is provided on the third liquid return pipeline. A circulating pump No. 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 heat exchange in the water source side heat exchanger 41, the medium returns to the hot water storage tank 3 through the third liquid return pipeline under the action of the circulating pump No. 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. A second compressor 42 is provided on the second compression liquid inlet pipeline. After the refrigerant in the water source side heat exchanger 41 gains heat, 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 a high-temperature and high-pressure form for heat exchange. A second throttling valve 44 is provided on the second throttling liquid return pipeline. After heat exchange in the user side water source heat exchanger 43, the refrigerant flows through the second throttling liquid return pipeline through the second throttling valve 44 and returns to the water source side heat exchanger 41 in a low-temperature and low-pressure form. 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 terminal 7. A valve No. 25 625 is provided on the fourth liquid inlet pipeline. A valve No. 26 626 is provided on the fourth liquid return pipeline. After the water medium in the user side water source heat exchanger 43 gains heat, it enters the user terminal 7 through the fourth liquid inlet pipeline for heat supply. A circulating pump No. 8 58 is provided on the fourth liquid return pipeline between the user side water source heat exchanger 43 and the user terminal 7. After heat supply in the user terminal 7, the water medium returns to the user side water source heat exchanger 43 through the fourth liquid return pipeline under the action of the circulating pump No. 8 58.

[0032] Embodiment 2, on the basis of Embodiment 1, is further optimized. As Figure 5 shown, a fifth liquid inlet pipeline and a fifth liquid return pipeline are connected between the hot water storage tank 3 and the user terminal 7. Preferably, the medium in the hot water storage tank 3 is a water medium. A valve No. 14 614 and a valve No. 19 619 are provided on the fifth liquid inlet pipeline. The heat energy stored in the hot water storage tank 3 directly enters the user terminal 7 in the form of hot water through the fifth liquid inlet pipeline for heat supply. A valve No. 16 616 and a valve No. 22 622 are provided on the fifth liquid return pipeline. A circulating pump No. 7 57 is provided on the fifth liquid return pipeline between the hot water storage tank 3 and the user terminal 7. After heat supply in the user terminal 7, the hot water returns to the hot water storage tank 3 through the fifth liquid return pipeline under the action of the circulating pump No. 7 57.

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

[0034] On the basis of the above embodiments, as a preferred embodiment, as Figure 7 shown in the figure, the second defrosting pipeline includes a second defrosting liquid inlet pipeline and a second defrosting liquid return pipeline connected between the hot water storage tank 3 and the air-side heat exchanger 21. A valve 613 and a valve 602 are provided on the second defrosting liquid inlet pipeline. The heat energy stored in the hot water storage tank 3 enters the air-side heat exchanger 21 for defrosting in the form of hot water through the second defrosting liquid inlet pipeline. The hot water flows in the coil of the air-side heat exchanger 21 to defrost the fin surface. A valve 603 and a valve 615 are provided on the second defrosting liquid return pipeline. A second circulating pump 52 is provided on the second defrosting liquid return pipeline between the hot water storage tank 3 and the air-side heat exchanger 21. After defrosting in the air-side heat exchanger 2, the hot water returns to the hot water storage tank 3 through the second defrosting liquid return pipeline and under the action of the second circulating pump 52.

[0035] The working method of the present utility model includes multiple working modes, and the working modes include a solar heating mode, a solar heat storage mode, a solar 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.

[0036] In the solar heating mode, valves 611 and 621 are opened, and the heat energy in the solar collector 1 heats the user end 7 through the first liquid inlet pipeline. Valves 624 and 610 are opened, and under the action of the fifth circulating pump 55 and the first circulating pump 51, the water medium for transferring heat energy returns to the solar collector 1 through the first liquid return pipeline.

[0037] In the solar heat storage mode, valve 612 is opened, and the excess heat energy in the solar collector 1 enters the hot water storage tank 3 through the first heat storage liquid inlet branch for heat storage. Valves 609 and 610 are opened, and under the action of the first circulating pump 51, the water medium returns to the solar collector 1 through the first heat storage liquid return branch.

[0038] In the solar defrosting mode, valve one 601 is opened. The heat energy in the solar collector 1 enters the air-side heat exchanger 21 for defrosting through the first defrosting liquid inlet pipeline. The water medium that transfers heat energy flows in the coil of the air-side heat exchanger 21 to defrost the fin surface. Valve four 604 is opened. Under the action of the first circulating water pump 51, the water medium returns to the solar collector 1 through the first defrosting 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 then enters the first compressor 22 through the first compression liquid inlet pipeline. Under the action of the first compressor 22, it is compressed into a high-temperature and high-pressure refrigerant. The high-temperature and high-pressure refrigerant enters the user-side heat exchanger 23 for heat exchange, and then flows through the first throttling liquid return pipeline and the first throttle valve 24, and returns to the air-side heat exchanger 21 in a low-temperature and low-pressure form to exchange heat with the outdoor air again. Valve five 605 and valve twenty 620 are opened. The heat energy in the user-side heat exchanger 23 enters the user end for heating through the second liquid inlet pipeline. Valve twenty-three 623 and valve seven 607 are opened. Under the action of the third circulating water pump 53 and the sixth circulating water pump 56, the water medium that transfers heat energy returns to the user-side heat exchanger 23 through the second liquid return pipeline.

[0040] In the air-source heat pump heat storage mode, valve six 606 is opened. The excess heat energy in the user-side heat exchanger 23 enters the heat storage water tank 3 for heat storage through the second heat storage liquid inlet branch. Valve eight 608 is opened. Under the action of the third circulating water pump 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] In the heat storage water tank heating mode, valve fourteen 614 and valve nineteen 619 are opened. The heat energy stored in the heat storage water tank 3 enters the user end 7 for heating through the fifth liquid inlet pipeline. Valve twenty-two 622 and valve sixteen 616 are opened. Under the action of the seventh circulating water pump 57, the water medium that transfers heat energy returns to the heat storage water tank 3 through the fifth liquid return pipeline.

[0042] In the heat storage water tank defrosting mode, valve two 602 and valve thirteen 613 are opened. The heat energy in the heat storage water tank 3 enters the air-side heat exchanger 21 for defrosting through the second defrosting liquid inlet pipeline. The water medium that transfers heat energy flows in the coil of the air-side heat exchanger 21 to defrost the fin surface. Valve three 603 and valve fifteen 615 are opened. Under the action of the second circulating water pump 52, the water medium returns to the heat storage water tank 3 through the second defrosting liquid return pipeline.

[0043] In the heat supply mode of the water source heat pump, valve 617 is opened, and the heat energy in the heat storage water tank 3 enters the water source side heat exchanger 41 through the third liquid inlet pipeline for heat exchange. Valve 618 is opened, and under the action of the circulating water pump 54, the water medium returns to the heat storage water tank 3 through the third liquid return pipeline; the refrigerant 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, the refrigerant enters the user side water source heat exchanger 43 for heat exchange in a high-temperature and high-pressure form, and flows through the second throttle valve 44 through the second throttle liquid return pipeline, and the refrigerant returns to the water source side heat exchanger 41 in a low-temperature and low-pressure form; valve 625 is opened, and the heat energy in the user side water source heat exchanger 43 enters the user end 7 for heat supply through the fourth liquid inlet pipeline. Valve 626 is opened, and under the action of the circulating water pump 858, the water medium that transfers heat energy returns to the user side water source heat exchanger 43 through the fourth liquid return pipeline.

[0044] The usage method of the present utility model is as follows:

[0045] According to the outdoor environmental conditions and load requirements, different operating modes are switched by adjusting the flow rates of valve 6 and circulating water pump 5.

[0046] 1. When the solar radiation intensity is high during the day and the load demand on the user side matches, the solar heat supply mode is operated.

[0047] 2. When the solar radiation intensity is high during the day and the load demand on the user side is low, the solar heat supply mode + solar heat storage mode is operated.

[0048] 3. When the outdoor air temperature is high and the load demand on the user side is high, the air source heat pump heat supply mode is operated.

[0049] 4. When the outdoor air temperature is high and the load demand on the user side is low, the air source heat pump heat supply mode + air source heat pump heat storage mode is operated.

[0050] 5. When the solar radiation intensity is low during the day, the outdoor air temperature is high, and the load demand on the user side is high, the solar heat supply mode + air source heat pump heat supply mode is operated.

[0051] 6. When the solar radiation intensity is low during the day, the outdoor air temperature is low, and the load demand on the user side is high, the solar heat supply mode + air source heat pump heat supply mode + heat storage water tank heat supply mode is operated.

[0052] 7. At night or on cloudy and rainy days, the solar energy system stops operating, that is, the solar heat supply mode and the solar heat storage mode stop operating. When the outdoor air temperature is high, the operating modes are the same as in working methods 3 and 4.

[0053] 8. At night or on cloudy and rainy days, when the outdoor air temperature is low and the load demand on the user side is high, the air source heat pump heat supply mode + heat storage water tank heat supply mode is operated.

[0054] 9. When the outdoor air temperature is extremely low at night or on rainy and cloudy days, operate the heat storage water tank heating mode.

[0055] 10. When the outdoor air temperature is extremely low at night or on rainy and cloudy days and the load demand on the user side is high, operate the heat storage water tank heating mode + water source heat pump heating mode.

[0056] 11. Drive the heat pump according to the peak-valley electricity price, adjust the flow rate of the circulating water pump of the electric-driven heat pump, which can improve the overall economy and heating performance of the system. When the electricity price is low, operate the air source heat pump heating mode, air source heat pump heat storage mode, and water source heat pump heating mode. 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 operating.

[0057] 12. For the air source heat pump system, when the outdoor air temperature remains extremely low for a long time, the air source heat pump stops operating. If the outdoor air temperature fluctuates throughout the day and the air source heat pump system needs to defrost, operate the solar defrost mode and heat storage water tank defrost mode. At night or on rainy and cloudy days, operate the heat storage water tank defrost mode.

[0058] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A multi-energy coupling heat pump heating system, characterized in that: It includes a solar thermal collection system, an air source heat pump system (2) and a water source heat pump system (4) that are connected to the user terminal (7) to form a heating circuit. A part of the thermal energy generated by the solar thermal collection system is transferred to the user terminal (7), and a part is stored in the hot water storage tank (3); a part of the thermal energy generated by the air source heat pump system (2) is transferred to the user terminal (7), and a part is 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 water source heat pump system (4) transfers the thermal energy in the hot water storage tank (3) to the user terminal (7). The solar thermal collection system and the air source heat pump system (2) are connected through a first defrosting pipeline, and the hot water storage tank (3) and the air source heat pump system (2) are connected through a second defrosting pipeline.

2. The multi-energy coupling heat pump heating system according to claim 1, wherein: The solar thermal collection system includes a solar collector (1). A first liquid inlet pipeline and a first liquid return pipeline are connected between the solar collector (1) and the user terminal (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 hot water storage tank (3) through 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) through a first heat storage liquid return branch, and a valve nine (609) is provided on the first heat storage liquid return branch. A circulation pump one (51) is provided on the first liquid return pipeline between the hot water storage tank (3) and the solar collector (1), and a circulation pump five (55) is provided on the first liquid return pipeline between the hot water storage tank (3) and the user terminal (7).

3. The multi-functional coupled heat pump heating system according to claim 2, characterized in that: The air source heat pump system includes 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). A first compressor (22) is provided on the first compression liquid inlet pipeline, and a first throttling valve (24) is provided on the first throttling liquid return pipeline; a second liquid inlet pipeline and a second liquid return pipeline are connected between the user side heat exchanger (23) and the user terminal (7). A valve five (605) and a valve twenty (620) are provided on the second liquid inlet pipeline. The second liquid inlet 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 liquid return pipeline. The second liquid return pipeline is connected to the hot water storage tank (3) through a second heat storage liquid return branch, and a valve eight (608) is provided on the second heat storage liquid return branch; a circulation pump three (53) is provided on the second liquid return pipeline between the hot water storage tank (3) and the user side heat exchanger (23), and a circulation pump six (56) is provided on the second liquid return pipeline between the hot water storage tank (3) and the user terminal (7).

4. The multi-functional coupled heat pump heating system according to claim 3, characterized in that: The first defrosting pipeline includes a first defrosting liquid inlet pipeline and a first defrosting liquid return pipeline. The first liquid inlet pipeline is communicated with the air-side heat exchanger (21) through the first defrosting liquid inlet pipeline, and a first valve (601) is arranged on the first defrosting liquid inlet pipeline; the first liquid return pipeline is communicated with the air-side heat exchanger (21) through the first defrosting liquid return pipeline, and a fourth valve (604) is arranged on the first defrosting liquid return pipeline.

5. The multi-functional coupled heat pump heating system according to claim 1, wherein: 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 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 seventeenth valve (617) is arranged on the third liquid inlet pipeline, and an eighteenth valve (618) is arranged on the third liquid return pipeline. A fourth circulating water pump (54) is arranged on the third liquid return pipeline between the hot water storage tank (3) and the water source-side heat exchanger (41); 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). The second compressor (42) is arranged on the second compression liquid inlet pipeline, and a second throttling valve (44) is arranged 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 terminal (7). A twenty-fifth valve (625) is arranged on the fourth liquid inlet pipeline, and a twenty-sixth valve (626) is arranged on the fourth liquid return pipeline. An eighth circulating water pump (58) is arranged on the fourth liquid return pipeline between the user-side water source heat exchanger (43) and the user terminal (7).

6. The multi-functional coupled heat pump heating system according to any one of claims 1 to 5, characterized in that: A fifth liquid inlet pipeline and a fifth liquid return pipeline are connected between the hot water storage tank (3) and the user terminal (7). A fourteenth valve (614) and a nineteenth valve (619) are arranged on the fifth liquid inlet pipeline, and a sixteenth valve (616) and a twenty-second valve (622) are arranged on the fifth liquid return pipeline. A seventh circulating water pump (57) is arranged on the fifth liquid return pipeline between the hot water storage tank (3) and the user terminal (7).

7. The multi-energy coupling heat pump heating system according to claim 6, characterized in that: The second defrosting pipeline includes a second defrosting liquid inlet pipeline and a second defrosting liquid return pipeline connected between the hot water storage tank (3) and the air-side heat exchanger (21). A second valve (602) and a thirteenth valve (613) are arranged on the second defrosting liquid inlet pipeline, and a third valve (603) and a fifteenth valve (615) are arranged on the second defrosting liquid return pipeline. A second circulating water pump (52) is arranged on the second defrosting liquid return pipeline between the hot water storage tank (3) and the air-side heat exchanger (21).

8. The multi-functional coupled heat pump heating system according to claim 7, characterized in that: An exhaust device and a water replenishing device are arranged on the hot water storage tank (3).

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

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