Air-water double-heat-source heat pump heating system and operation control method

Abstract

The invention discloses an air-water double-heat-source heat pump heating system and an operation control method. The air-water double-heat-source heat pump heating system comprises a solar heat collection heat source, a heat exchanger, a first water storage device, a second water storage device, an air-water double-heat-source heat pump unit, a user side and a computing control unit. The solar heat collection heat source absorbs solar heat into the solar heat collection cycle working medium; the heat exchanger exchanges heat in the solar heat collection cycle working medium to the first water storage equipment; the first water storage device and the second water storage device store hot water generated in different heating modes and send the hot water to a user side for heat supply in cooperation with the heating modes. The air-water double-heat-source heat pump unit exchanges heat of hot water in the first water storage device and heat of surrounding air into water in the second water storage device according to different operation modes respectively or simultaneously. And the calculation control unit operates the control strategy and calculates and analyzes the system energy consumption. Reasonable mode switching logic is set, the optimal operation mode of the system under different conditions can be obtained, and the energy consumption of the system is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of renewable energy heating and heat supply, and relates to an air-water dual heat source heat pump heating system and an operation control method. Background Art

[0002] In order to cope with the volatility and intermittency of solar energy and improve the operational reliability and heating guarantee rate of solar heating systems, the heating form combining solar energy and heat pump units has attracted attention, mainly including two methods: (1) Air source heat pump as an auxiliary heat source of the solar thermal system: When the hot water generated by the solar thermal heat source cannot meet the heating requirements, the air source heat pump is started to extract heat from the air to increase the water temperature of the hot water storage tank, and then provide heating to the user. (2) Combination of solar thermal system and water source heat pump for heating: When the hot water generated by the solar thermal heat source cannot meet the heating requirements, the water source heat pump is started to absorb the heat of the water supply on the solar thermal side to increase the water temperature on the user side. However, the first method mentioned above has the problem of excessive continuous operation time of the air source heat pump and high power consumption due to unreasonable system operation control; the second heating method has the problem of low adaptability to multiple environmental conditions and difficulty in meeting the heating needs of users due to the single heat source form of the water source heat pump and the limited total heat amount. Summary of the invention

[0003] In view of the deficiencies in the prior art, the purpose of the present invention is to provide an air-water dual-source heat pump heating system and an operation control method to solve the above-mentioned problems such as high electricity consumption and difficulty in meeting user heating needs. The heat pump unit provided can absorb both the heat of the surrounding air and the heat of the solar thermal collector, thereby improving the system's adaptability to multiple environmental conditions. By reasonably setting the system structure and using a computing control unit to reasonably control the system operation mode, the system's energy consumption can be reduced while ensuring continuous heating at the terminal.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions to achieve the above problems:

[0005] An air-water dual heat source heat pump heating system, comprising a solar heat collecting heat source, a heat exchanger, a first water storage device, a second water storage device, an air-water dual heat source heat pump unit, a user end and a computing control unit; the air-water dual heat source heat pump unit comprises a water side evaporator, an air side evaporator, a compressor, a compressor motor, a condenser, an expansion valve, a fourth electronic switching valve and a fifth electronic switching valve;

[0006] The solar heat collection heat source can absorb solar heat and heat the solar heat collection circulating medium, and the solar heat collection circulating medium exchanges heat with the water in the first water storage device through the heat exchanger to increase the temperature of the water in the first water storage device;

[0007] On the pipeline connecting the heat exchanger and the first water storage device, the first circulating water pump, the first heat meter temperature sensor II, the heat exchanger and the first heat meter temperature sensor I are arranged in sequence according to the water flow direction; the first heat meter temperature sensor II and the first heat meter temperature sensor I are connected to the first heat meter;

[0008] The first water storage device and the second water storage device are connected through a first heat exchange coil provided in the first water storage device and a second heat exchange coil provided in the second water storage device, and the circulating working medium in the connected pipeline exchanges heat, and the pipeline is respectively provided with a third electronic switching valve and a fourth circulating pump according to the flow sequence of the circulating working medium;

[0009] The air-water dual heat source heat pump unit is connected to the first water storage device, the water side evaporator is arranged in the first water storage device, the water side evaporator is connected in series with the expansion valve, the condenser, and the compressor, and the air side evaporator is placed in the surrounding air and connected in parallel with the water side evaporator; the condenser of the air-water dual heat source heat pump unit is connected to the second water storage device; on the return pipeline connected to the condenser and the second water storage device, the fifth circulating water pump, the second heat meter temperature sensor I, the condenser, and the second heat meter temperature sensor II are arranged in sequence according to the water flow direction; the second heat meter temperature sensor I and the second heat meter temperature sensor II are connected between the second heat meter temperature sensor I and the second heat meter temperature sensor II; the first water storage device and the second water storage device are respectively connected to the user end;

[0010] The calculation control unit controls the start and stop of the air-water dual-source heat pump unit, valves, and water pump by reading the temperature data of the first temperature sensor of the first water storage device, the second temperature sensor of the second water storage device, and the heat data of the first heat meter and the second heat meter, and selects a suitable operation mode of the heating system to achieve the purpose of operation control; at the same time, the calculation control unit can monitor the surrounding meteorological data, and can also read the data of the power sensor connected to the compressor motor, and calculate the system energy consumption and economy in combination with the heat data, so as to optimize the system operation mode.

[0011] The present invention also includes the following technical features:

[0012] Specifically, the fourth electronic switching valve is arranged on the pipeline connected to the water-side evaporator, and the fifth electronic switching valve is arranged on the pipeline connected to the air-side evaporator, and is used to adjust the working state of the heat pump unit.

[0013] Specifically, the pipeline connecting the first water storage device and the user end is provided with a first electronic switching valve and a second circulating water pump according to the water flow direction; the pipeline connecting the second water storage device and the user end is provided with a second electronic switching valve and a sixth circulating water pump according to the water flow direction.

[0014] Specifically, the water on the second water storage device side of the condenser comes from the return water of the BC passage of the first electronic three-way valve on the pipeline connected to the second water storage device after flowing through the user end. The return water pipeline is connected to the second water storage device after heat exchange with the condenser; the BA passage of the first electronic three-way valve directly returns to the second water storage device.

[0015] The air-water dual-source heat pump heating system operation control method can control a variety of operation modes for independent or combined heating of hot water generated by heat exchange of solar heat collection heat source and air-water dual-source heat pump unit, and use air-water dual-source heat pump unit as core equipment for heating, and send the heat of hot water in the first water storage device that does not meet the heating demand into the water-side evaporator of the air-water dual-source heat pump unit, and generate hot water that meets the heating temperature through the single water source working state or the air-water dual-source working state of the heat pump unit, or only absorb the heat of the surrounding air, and use the single air source working state of the heat pump unit to generate hot water that meets the heating temperature. state to produce hot water that meets the heating temperature; the parameters involved in the control method include: the heat Q1 exchanged to the first water storage device through the heat exchanger, the heat Q0 required by the user end, the preset excess heat ΔQ, the heat Q2 that the water-side evaporator needs to absorb when the heat pump unit uses a single water source working state to produce the heat Q0 required by the user end, the heat Q3 that needs to be released when the hot water in the first water storage device is cooled to 5°C, the electric power W1 consumed by the heat pump unit when selecting the air-water dual-source working state to produce the heat Q0 required by the user end, and the electric power W2 consumed by the heat pump unit when selecting the single air source working state to produce the heat Q0 required by the user end.

[0016] Specifically, it includes controlling and implementing operation mode 1: when Q1>Q0+ΔQ, the water temperature in the first water storage device exceeds the first temperature threshold value T1, and the calculation and control unit turns on the third electronic switching valve and the fourth circulation pump, so that the hot water in the first water storage device exchanges heat with the hot water in the second water storage device through the circulating working fluid in the pipeline between the first heat exchange coil and the second heat exchange coil; when the feedback temperature of the second temperature sensor exceeds the second temperature threshold value T2, the calculation and control unit turns on the second electronic switching valve and the sixth circulation water pump, and switches the first electronic three-way valve to the BA passage, and the hot water in the second heat exchange device is sent to the user end for heating through the sixth circulation water pump. After heating, the return water on the second water storage device side of the user end flows through the BA passage of the first electronic three-way valve and then flows to the second water storage device, completing the entire heating cycle.

[0017] Specifically, it includes controlling to implement operation mode 2: when Q0 < Q1 < Q0 + ΔQ, the water temperature in the first water storage device is higher than the second temperature threshold T2 and lower than the first temperature threshold T1. The calculation control unit closes the third electronic switching valve, the fourth circulation pump, the sixth circulation water pump, and the second electronic switching valve, opens the first electronic switching valve and the second circulation pump, keeps the first circulation pump open, and adjusts the first electronic three-way valve to the B-C path. The hot water is directly sent into the user terminal through the second circulation pump. After heating the user at the user terminal, the return water returns to the first water storage device through the return water end of the first water storage device, completing the entire heating cycle.

[0018] Specifically, it includes controlling to implement operation mode 3: when Q1 < Q0, the heat pump is used to meet the heating demand. When Q2 < Q3, the water temperature in the first water storage device is higher than the third temperature threshold T3 and lower than the second temperature threshold T2. The calculation control unit closes the first electronic switching valve and the second circulation pump, opens the compressor motor, the fourth electronic switching valve, and the fifth circulation pump, keeps the first electronic three-way valve in the B-C path and the fifth electronic switching valve closed, so that the heat pump unit enters the single-source working state. The hot water prepared by the heat pump unit is stored in the second water storage device. When the second temperature sensor feeds back that the temperature is higher than the second temperature threshold T2, the calculation control unit opens the second electronic switching valve and the sixth circulation pump, and the water meeting the heating requirements is sent into the user terminal through the sixth circulation pump. After heating, it returns to the condenser for heat exchange through the B-C path of the first electronic three-way valve on the return water side of the second water storage device, completing the entire heating cycle.

[0019] Specifically, it includes controlling to implement operation mode 4: when Q1 < Q0, Q3 < Q2, and W1 < W2, the water temperature in the first water storage device is higher than the fourth temperature threshold T4 and lower than the third temperature threshold T3. The fifth electronic switching valve is opened, the fourth electronic switching valve, the compressor motor, and the fifth circulation pump are kept open, and the first electronic three-way valve is kept open in the B-C path, so that the heat pump unit enters the air-water dual-source working state. The hot water prepared by the air-water dual-source heat pump is stored in the second water storage device. When the second temperature sensor feeds back that the temperature is higher than the second temperature threshold T2, the calculation control unit opens the second electronic switching valve and the sixth circulation pump to supply heat to the user terminal. After releasing heat for heating at the user terminal, the return water returns to the condenser side of the second water storage device through the B-C path of the first electronic three-way valve on the return water side pipeline of the second water storage device at the user terminal to continue absorbing heat, completing the entire heating cycle.

[0020] Specifically, it includes controlling to implement operating mode five: when Q1 < Q0, Q3 < Q2, and W2 < W1, the water temperature in the first water storage device has dropped below the fourth temperature threshold T4. The calculation and control unit turns off the first circulating water pump and the fourth electronic switching valve, keeps the fifth electronic switching valve, the compressor motor, and the fifth circulating water pump turned on, and keeps the first electronic three-way valve's B-C passage open, so that the heat pump unit enters the single air source working state. The hot water prepared by the heat pump unit is stored in the second water storage device. When the second temperature sensor feeds back a temperature higher than the second temperature threshold T2, the calculation and control unit turns on the second electronic switching valve and the sixth circulating water pump to supply heat to the user side. After releasing heat for heating at the user side, the return water returns to the water side of the condenser through the B-C passage of the first electronic three-way valve on the return water side pipeline of the second water storage device at the user side to continue absorbing heat, completing the entire heating cycle.

[0021] Compared with the prior art, the present invention has the following technical effects:

[0022] The present invention determines the operating mode of the system by using the water temperature in the first water storage device, the water temperature in the second water storage device, the heat exchanged into the first water storage device by the heat exchanger, the compressor power, and the heat entering the second water storage device. The calculation and control unit calculates the key criteria and adjusts the operating mode. The reasonable structure of the heat pump unit is matched with the corresponding operation control method, so that the system always operates in the most efficient heat conversion mode, enabling the system to maximize the heat utilization rate of the solar heat collection heat source and reduce the energy consumption of the system while ensuring the user's heating experience.

[0023] The present invention relates to two water storage devices and five operating modes, adding operating modes when the sun is abundant and the dual-source heat pump air-water dual-source working state: when the sun is abundant, the hot water generated by the redundant solar heat collection heat source will be sent into the second water storage device and then used to supply heat to the user side, reducing the waste of the heat of the solar heat collection heat source. At the same time, after the calculation and control unit determines that the criterion is established, the heat pump unit will be made to use the air source and the water source evaporator alone or simultaneously to provide hot water that meets the heating requirements for the user side, improving the system's adaptability to the environment and obtaining better system operating efficiency.

[0024] The present invention proposes a detailed quantitative control method. The calculation and control unit calculates the key parameters, and determines a more reasonable operating mode for the heating system through data comparison to ensure that the system operates under optimal conditions.

[0025] In the present invention, in addition to controlling the system operating mode, the calculation and control unit will analyze and calculate the best operating mode of the system by reading the surrounding meteorological parameters and find the most suitable operating mode switching scheme. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1Schematic diagram of an air-water dual heat source heat pump heating system in an embodiment of the present invention.

[0027] Figure 2 It is a schematic diagram of the operation flow of the air-water dual heat source heat pump heating system mode in an embodiment of the present invention.

[0028] The meaning of each number in the figure is:

[0029] 1. First water storage device, 2. Water side evaporator, 3. Air side evaporator, 4.1. Compressor, 4.2. Compressor motor, 5. Condenser, 6. Expansion valve, 7. Second water storage device, 8. User end, 9. First heat exchange coil, 10. Second heat exchange coil, 11. Heat exchanger, 12. First temperature sensor, 13. First heat meter, 13.1. First heat meter temperature sensor I, 13.2. First heat meter temperature sensor II, 14. Second heat meter, 14.1. Second heat meter temperature sensor I, 14.2. Second heat meter temperature sensor II, 15. Second temperature sensor, 16. Power sensor, 17. Solar thermal heat source, 18. Fourth electronic switching valve, 19. Fifth electronic switching valve, 20. Third electronic switching valve, 21. Second electronic switching valve, 22. First electronic three-way valve, 23. First electronic switching valve, 24. First circulating water pump, 25. Fourth circulating pump, 26. Fifth circulating water pump, 27. Sixth circulating water pump, 28. Second circulating water pump, 29. Computation control unit. DETAILED DESCRIPTION

[0030] Specific embodiments of the present invention are given below. It should be noted that the present invention is not limited to the following specific embodiments, and all equivalent changes made on the basis of the technical solution of this application fall within the protection scope of the present invention.

[0031] Embodiment 1:

[0032] like Figure 1 As shown, this embodiment provides an air-water dual heat source heat pump heating system, including a solar heat collection heat source 17, a heat exchanger 11, a first water storage device 1, a second water storage device 7, an air-water dual heat source heat pump unit, a user end 8 and a calculation control unit 29; the air-water dual heat source heat pump unit includes a water side evaporator 2, an air side evaporator 3, a compressor 4.1, a compressor motor 4.2, a condenser 5, an expansion valve 6, and a fourth electronic switching valve 18 and a fifth electronic switching valve 19 for controlling the operation of the evaporator.

[0033] The solar heat collection heat source 17 can absorb solar heat and heat the solar heat collection circulating medium. The solar heat collection circulating medium exchanges heat with the water in the first water storage device 1 through the heat exchanger 11 to increase the temperature of the water in the first water storage device 1.

[0034] On the pipeline connecting the heat exchanger 11 and the first water storage device 1, the first circulating water pump 24, the first heat meter temperature sensor II13.2, the heat exchanger 11 and the first heat meter temperature sensor I13.1 are arranged in order according to the water flow direction; the first heat meter 13 is connected between the first heat meter temperature sensor II13.2 and the first heat meter temperature sensor I13.1; the first circulating water pump 24 is used to accelerate the flow rate of water on the first water storage device 1 side of the heat exchanger 11, so that the water in the first water storage device 1 can fully exchange heat with the solar heat collection circulating working fluid, and the first heat meter temperature sensor II13.2 and the first heat meter temperature sensor I13.1 are used to collect temperature data and transmit it to the first heat meter 13, so as to monitor the heat exchange between the water in the first water storage device 1 and the solar heat collection working fluid.

[0035] The first water storage device 1 is connected to the second water storage device 7 through a first heat exchange coil 9 provided in the first water storage device 1 and a second heat exchange coil 10 provided in the second water storage device 7. The circulating working fluid in the connected pipeline exchanges heat. A third electronic switching valve 20 and a fourth circulating pump 25 are provided on the pipeline according to the flow sequence of the circulating working fluid. The first water storage device 1 is used to store water whose temperature is increased by the heat exchanger 11, and to provide heating to the user end 8 in accordance with the operation mode of the system. The second water storage device 7 is used to store hot water prepared by the air-water dual heat source heat pump unit and hot water generated by heat exchange with the first water storage device 1, and to provide heating to the user end 8 in accordance with the operation mode of the system.

[0036] The air-water dual heat source heat pump unit is connected to the first water storage device 1, the water side evaporator 2 is arranged in the first water storage device 1, absorbs the heat of the water in the first water storage device 1, the water side evaporator 2 is connected in series with the expansion valve 6, the condenser 5, and the compressor 4.1, the air side evaporator 3 is placed in the surrounding air, absorbs the heat of the surrounding air, and is connected in parallel with the water side evaporator 2; the condenser 5 of the air-water dual heat source heat pump unit is connected to the second water storage device 7; the heat is sent to the condenser 5 side through the refrigerant in the heat pump cycle, and the heat of the refrigerant is exchanged to the second water storage device for heat exchange with the condenser 5 through the condenser 5 In the side loop of the standby device 7; on the return pipe connecting the condenser 5 and the second water storage device 7, the fifth circulating water pump 26, the second heat meter temperature sensor I14.1, the condenser 5 and the second heat meter temperature sensor II14.2 are arranged in sequence according to the water flow direction; the second heat meter 14 is connected between the second heat meter temperature sensor I14.1 and the second heat meter temperature sensor II14.2; the first water storage device 1 and the second water storage device 7 are respectively connected to the user end 8. In addition to obtaining the hot water required for heating from the first water storage device 1, the user end 8 can also obtain the hot water required for heating through the second water storage device 7.

[0037] The calculation control unit 29 controls the start and stop of the air-water dual-source heat pump unit, valves and water pump by reading the temperature data of the first temperature sensor 12 of the first water storage device 1, the second temperature sensor 15 of the second water storage device 7 and the heat data of the first heat meter 13 and the second heat meter 14, and selects the appropriate operation mode of the heating system to achieve the purpose of operation control; at the same time, the calculation control unit 29 can monitor the surrounding meteorological data, and can also read the data of the power sensor 16 connected to the compressor motor 4.2, and calculate the system energy consumption and economy in combination with the heat data, so as to optimize the system operation mode.

[0038] Specifically, the calculation control unit 29 calculates the signal input into the unit and, based on the signal source, starts and closes the corresponding controlled sub-devices to start and close the air-water dual-source heat pump unit, switch the refrigerant circulation path and the heating hot water delivery path in the air-water dual-source heat pump, and thus control the system heating mode selection.

[0039] The control signal sources of the calculation control unit 29 include: a first temperature sensor 12 placed in the first water storage device 1, a second temperature sensor 15 placed in the second water storage device 7, a first heat meter 13 placed on the side of the first water storage device 1 of the heat exchanger 11, a second heat meter 14 placed on the side of the second water storage device 7 of the air-water dual heat source heat pump condenser 5, and a power sensor 16 placed at the compressor motor 4.2.

[0040] The sub-devices controlled by the calculation control unit 29 include: a first circulating water pump 24 on the first water storage device 1 side of the heat exchanger 11, a first electronic switching valve 23 and a second circulating water pump 28 on the pipeline connecting the first water storage device 1 to the user end 8, a fourth electronic switching valve 18 and a fifth electronic switching valve 19 arranged inside the air-water dual heat source heat pump, a third electronic switching valve 20 and a fourth circulating pump 25 arranged on the heat exchange pipeline between the first water storage device 1 and the second water storage device 7, a fifth circulating water pump 26 arranged on the pipeline on the second water storage device 7 side of the air-water dual heat source heat pump condenser 5, a second electronic switching valve 21 and a sixth circulating water pump 27 arranged on the pipeline connecting the second water storage device 7 to the user end 8, and a first electronic three-way valve 22 arranged on the pipeline returning to the second water storage device 7 after the user end 8.

[0041] The fourth electronic switching valve 18 is arranged on the pipeline connected to the water-side evaporator 2, and the fifth electronic switching valve 19 is arranged on the pipeline connected to the air-side evaporator 3, for adjusting the working state of the heat pump unit.

[0042] A first electronic switching valve 23 and a second circulating water pump 28 are provided on the pipeline connecting the first water storage device 1 and the user end 8 according to the water flow direction; a second electronic switching valve 21 and a sixth circulating water pump 27 are provided on the pipeline connecting the second water storage device 7 and the user end 8 according to the water flow direction.

[0043] The water on the second water storage device 7 side of the condenser 5 comes from the return water of the BC passage of the first electronic three-way valve 22 on the pipeline that flows through the user end 8 and then connects to the second water storage device 7. The return water pipeline is connected to the second water storage device 7 after heat exchange with the condenser 5; the BA passage of the first electronic three-way valve 22 on the pipeline of the second water storage device 7 directly returns to the second water storage device 7, and the BC passage is connected to the second water storage device 7 side of the air-water dual heat source heat pump condenser 5.

[0044] Embodiment 2:

[0045] like Figure 2 As shown, the present embodiment provides an operation control method for an air-water dual-source heat pump heating system, which can control a variety of operation modes for independent or combined heating of hot water generated by heat exchange with a solar thermal collector and an air-water dual-source heat pump unit, and uses the air-water dual-source heat pump unit as a core device for heating. The heat of the hot water in the first water storage device that does not meet the heating demand is sent to the water-side evaporator of the air-water dual-source heat pump unit, and hot water that meets the heating temperature is generated by the single water source working state or the air-water dual-source working state of the heat pump unit, instead of raising the temperature of the hot water generated by heat exchange with the solar thermal collector circulating working fluid in a single water source heat pump manner, thereby improving the utilization efficiency of the heat of the solar thermal collector in the heating system.

[0046] The operation control method includes controlling and implementing operation mode 1: when the heat Q1 exchanged to the first water storage device through the heat exchanger is higher than the sum of the heat Q0 required by the user end and the preset excess heat ΔQ, that is, Q1>Q0+ΔQ, the water temperature in the first water storage device is higher than the first temperature threshold T1; the calculation control unit turns on the first circulation water pump to make the water in the first water storage device exchange heat with the solar heat collection circulation working fluid in the solar heat collection heat source through the heat exchanger; when the heat Q1 exchanged to the first water storage device through the heat exchanger is higher than the sum of the heat Q0 required by the user end and the preset excess heat ΔQ, the water temperature in the first water storage device exceeds the first temperature threshold T1, and the calculation control unit sends a signal to the third electronic switching valve and the fourth circulation pump : Open the third electronic switching valve and the fourth circulation pump, so that the hot water in the first water storage device can exchange heat with the hot water in the second water storage device through the circulating working fluid in the pipeline between the first heat exchange coil and the second heat exchange coil; when the feedback temperature of the second temperature sensor exceeds the second temperature threshold T2, the calculation and control unit sends a signal to the second electronic switching valve, the sixth circulation water pump, and the first electronic three-way valve: open the second electronic switching valve and the sixth circulation water pump, and switch the first electronic three-way valve to the BA passage, and send the hot water in the second heat exchange device to the user end for heating through the sixth circulation water pump. After heating, the return water on the second water storage device side of the user end flows through the BA passage of the first electronic three-way valve and then flows to the second water storage device, completing the entire heating cycle.

[0047] At this time, since Q1>Q0+ΔQ, the second water storage device is used as the heating device, and the first water storage device is used as the heat exchange device for the second water storage device; the specific process is as follows: The hot water whose heat exchange has been fully carried out exceeds the sum of the heat required by the user side Q0 and the preset excess heat ΔQ, that is, Q1>Q0+ΔQ. The circulating working medium exchanges heat between the first heat exchange coil and the second heat exchange coil through the fourth circulation pump; when the water temperature in the second water storage device reaches the heating requirement, the heating pipeline is opened through the calculation control unit. At this time, the hot water in the second heat exchange device is sent into the user side for heating through the sixth circulation water pump. After heating, the return water on the second water storage device side of the user side flows through the B-A path of the first electronic three-way valve and then flows into the second water storage device to complete the entire heating cycle.

[0048] The operation control method includes controlling to implement operation mode two: When the heat Q1 exchanged into the first water storage device through the heat exchanger is higher than the heat Q0 required by the user side but less than the sum of the heat Q0 required by the user side and the preset excess heat ΔQ, that is, Q0<Q1<Q0+ΔQ, the water temperature in the first water storage device is higher than the second temperature threshold T2 and lower than the first temperature threshold T1. The calculation control unit sends signals to the third electronic switching valve, the fourth circulation pump, the sixth circulation pump, the first circulation pump, the first electronic switching valve, the second circulation pump, and the first electronic three-way valve: close the third electronic switching valve, the fourth circulation pump, the sixth circulation pump, and the second electronic switching valve, open the first electronic switching valve and the second circulation pump, keep the first circulation pump open, and adjust the first electronic three-way valve to the B-C path. It is directly sent into the user side through the second circulation pump. After heating the user at the user side, the return water returns to the first water storage device through the return water end of the first water storage device to complete the entire heating cycle.

[0049] At this time, since Q0<Q1<Q0+ΔQ, the system directly uses the hot water in the first water storage device for heating. The specific process is as follows: The hot water in the first water storage device that meets the heating requirement is directly sent into the user side through the second circulation pump. After heating the user at the user side, the return water returns to the first water storage device through the return water end of the first water storage device to complete the entire heating cycle.

[0050] When the energy Q1 exchanged into the first water storage device through the heat exchanger is lower than the heat Q0 required by the user side, that is, Q1<Q0, a heat pump is used to meet the heating requirement:

[0051] The heating system adjusts the working state of the heat pump unit by controlling the fourth electronic switching valve and the fifth electronic switching valve:

[0052] ① Single water source working state: the unit opens the fourth electronic switching valve and closes the fifth electronic switching valve, so that the unit only uses the water-side evaporator to absorb the heat in the hot water in the first water storage device, so that the refrigerant changes from a low-temperature and low-pressure liquid to a low-temperature and low-pressure gaseous refrigerant in the evaporator. The refrigerant then enters the compressor to be compressed to form a high-temperature and high-pressure gaseous refrigerant. The refrigerant then releases heat through the condenser, turning the refrigerant into a high-temperature and high-pressure liquid, and exchanges the heat to the water flowing into the second heat exchange device. Finally, the refrigerant passes through the expansion valve to throttle and reduce the pressure, so that the refrigerant becomes a low-temperature and low-pressure liquid and enters the evaporator to repeat the entire heating cycle;

[0053] ② Air-water dual-source working state: The unit opens the fourth electronic switching valve and the fifth electronic switching valve, so that the unit uses the water-side evaporator and the air-side evaporator to absorb the heat in the hot water in the first water storage device and the surrounding air at the same time, so that the refrigerant changes from a low-temperature and low-pressure liquid to a low-temperature and low-pressure gaseous refrigerant in the evaporator. The refrigerant then enters the compressor to be compressed to form a high-temperature and high-pressure gaseous refrigerant. The refrigerant then releases heat through the condenser, and the refrigerant becomes a high-temperature and high-pressure liquid, and exchanges heat to the water flowing into the second heat exchange device. Finally, the refrigerant is throttled and depressurized by the expansion valve, so that the refrigerant becomes a low-temperature and low-pressure liquid, and enters the evaporator to repeat the entire heating cycle;

[0054] ③ Single air source working state: the unit opens the fifth electronic switching valve and closes the fourth electronic switching valve, so that the unit only uses the air side evaporator to absorb heat from the surrounding air, allowing the refrigerant to change from a low-temperature and low-pressure liquid to a low-temperature and low-pressure gaseous refrigerant in the evaporator. The refrigerant then enters the compressor to be compressed to form a high-temperature and high-pressure gaseous refrigerant. The refrigerant then releases heat through the condenser, and the refrigerant becomes a high-temperature and high-pressure liquid, and exchanges heat to the water flowing into the second heat exchange device. Finally, the refrigerant is throttled and reduced in pressure through the expansion valve, so that the refrigerant becomes a low-temperature and low-pressure liquid and enters the evaporator to repeat the entire heating cycle.

[0055] The operation control method includes controlling to implement operation mode three: when the heat pump unit uses the single water source heat pump working state to generate the heat quantity Q0 required by the user side, and the heat quantity Q2 that the water-side evaporator needs to absorb is less than the heat quantity Q3 that the hot water in the first water storage device needs to release when cooled to 5°C, that is, when Q1 < Q0 and Q2 < Q3, the water temperature in the first water storage device is higher than the third temperature threshold T3 and lower than the second temperature threshold T2. The calculation control unit sends signals to the first electronic switching valve, the second circulation pump, the first electronic three-way valve, the compressor motor, the fourth electronic switching valve, the fifth electronic switching valve, and the fifth circulation pump: close the first electronic switching valve and the second circulation pump, turn on the compressor motor, the fourth electronic switching valve, and the fifth circulation pump, keep the first electronic three-way valve in the B-C passage, and close the fifth electronic switching valve, so that the heat pump unit enters the single water source working state; the hot water prepared by the heat pump unit is stored in the second water storage device. When the second temperature sensor feeds back that the temperature is higher than the second temperature threshold T2, the calculation control unit sends signals to the second electronic switching valve and the sixth circulation pump: turn on the second electronic switching valve and the sixth circulation pump, and the water that meets the heating requirements is sent to the user side through the sixth circulation pump. After heating, it returns to the condenser for heat exchange through the B-C passage of the first electronic three-way valve on the return water side of the second water storage device, completing the entire heating cycle.

[0056] At this time, since Q1 < Q0 and Q2 < Q3, the hot water used for heat exchange with the working fluid of the solar heat collection cycle cannot directly meet the heating demand. At this time, the first temperature sensor 1 feeds back that the water temperature exceeds the third temperature threshold T3 and is lower than the second temperature threshold T2, that is, the unit can meet the heating demand in the single water source working state. The air-water dual-source heat pump unit operates in the single water source working state. The specific process is as follows: The water in the first water storage device exchanges heat with the working fluid of the solar heat collection cycle through the heat exchanger, raising the water temperature in the first water storage device. However, the water in the first water storage device does not reach the heating requirement and its temperature exceeds the third temperature threshold T3 and is lower than the second temperature threshold T2. The heat of the hot water that does not reach the heating temperature requirement is released in the water-side evaporator of the first heat exchange device, causing the refrigerant in the heating cycle to vaporize. The state of the refrigerant changes from a low-temperature and low-pressure liquid to a low-temperature and low-pressure gas. Then the refrigerant is compressed by the compressor, and its state becomes a high-temperature and high-pressure gas refrigerant. After that, the refrigerant enters the condenser and releases heat to the second water storage device side of the condenser, and the refrigerant becomes a high-temperature and high-pressure liquid. Finally, the refrigerant passes through the expansion valve for throttling and pressure reduction, causing the refrigerant to return to the low-temperature and low-pressure liquid state and return to the evaporator to repeat the entire heating cycle. On the second water storage device side of the condenser, the fifth circulation pump sends water into the condenser to fully exchange heat with the refrigerant and then sends it into the second water storage device. When the second temperature sensor on the second water storage device feeds back that the water temperature exceeds the second temperature threshold T2, the water that meets the heating requirement is sent to the user side through the sixth circulation pump. After heating, it returns to the condenser for heat exchange through the first electronic three-way valve B-C path on the return water side of the second water storage device to complete the entire heating cycle. At the same time, the first heat meter, the second heat meter, and the power sensor have been sending signals to the calculation and control unit. The calculation and control unit calculates and stores these signals, judges the current efficiency of the system, and the calculation and control unit also reads the surrounding meteorological data. And the most suitable operation mode switching scheme is found through the surrounding meteorological data read by the calculation and control unit and the calculated system efficiency.

[0057] The operation control method includes controlling to implement operation mode four: when the heat pump unit uses a single water source working state to generate the heat quantity Q0 required by the user side, the heat quantity Q2 that the water-side evaporator needs to absorb is greater than the heat quantity Q3 that the hot water in the first water storage device needs to release when cooled to 5°C, and the electric power consumption W1 of the heat pump unit in the air-water dual-source working state to generate the heat quantity Q0 required by the user side is lower than the electric power consumption W2 of the heat pump unit in the single air-source working state to generate the heat quantity Q0 required by the user side, that is, Q1 < Q0, Q3 < Q2, W1 < W2, the water temperature in the first water storage device is higher than the fourth temperature threshold T4 and lower than the third temperature threshold T3. The system sends signals to the fourth electronic switching valve, the fifth electronic switching valve, the compressor motor, the fifth circulating water pump, and the first electronic three-way valve, so that the fifth electronic switching valve is opened, the fourth electronic switching valve, the compressor motor, and the fifth circulating water pump are kept open, and the first electronic three-way valve is kept open in the B-C passage, so that the heat pump unit enters the air-water dual-source working state; the hot water prepared by the air-water dual-source heat pump is stored in the second water storage device. When the temperature feedback by the second temperature sensor is higher than the second temperature threshold T2, the calculation control unit sends signals to the second electronic switching valve and the sixth circulating water pump: open the second electronic switching valve and the sixth circulating water pump to supply heat to the user side. After releasing heat for heating at the user side, the return water returns to the condenser second water storage device side through the B-C passage of the first electronic three-way valve on the return water side pipeline of the second water storage device at the user side to continue absorbing heat, completing the entire heating cycle.

[0058] At this time, since Q1 < Q0, Q3 < Q2, and W1 < W2, that is, the heat pump unit can meet the heating demand at a relatively low operating cost only when it operates in the air-water dual heat source working state. The air-water dual heat source heat pump unit operates in the air-water dual heat source working state. The specific process is as follows: The water in the first water storage device exchanges heat with the solar collector circulating working medium through the heat exchanger, increasing the water temperature in the first water storage device. However, through the analysis of the calculation control unit, it is determined that the heat pump unit needs to select the air-water dual heat source working state to meet the heating demand at a relatively low operating cost. At this time, the fifth electronic switching valve is opened, and the fourth electronic switching valve is kept open; the air-water dual heat source heat pump simultaneously absorbs the heat from the first water storage device and the surrounding air through the water-side evaporator and the air-side evaporator, causing the state of the refrigerant in the evaporator to change from a low-temperature and low-pressure liquid state to a low-temperature and low-pressure gaseous state. In addition, the circulation process and the phase change process of the refrigerant in the heating cycle are the same as those in the aforementioned operation mode three. At the same time, in the condenser, the water in the second water storage device exchanges heat with the refrigerant in the heating cycle, and the hot water generated by the heat exchange is sent into the second water storage device through the fifth circulating pump. When the temperature feedback by the second temperature sensor is greater than the second temperature threshold T2, the system opens the second electronic switching valve and the sixth circulating pump through the calculation control unit, and sends the hot water that meets the heating requirement to the user side. After releasing heat for heating at the user side, the return water returns to the condenser second water storage device side through the first electronic three-way valve B-C path on the return water side pipeline of the second water storage device at the user side to continue absorbing heat, completing the entire heating cycle. At the same time, the first heat meter, the second heat meter, and the power sensor have been sending signals to the calculation control unit, and the calculation control unit also plays the same role as in operation mode three.

[0059] The operation control method includes controlling to implement operation mode five: when the heat pump unit uses a single water source working state to generate the heat quantity Q0 required by the user side, the heat quantity Q2 that the water-side evaporator needs to absorb is greater than the heat quantity Q3 that the hot water in the first water storage device needs to release when cooled to 5°C, and the electric power consumption W2 of the heat pump unit when selecting a single air source working state to generate the heat quantity Q0 required by the user side is lower than the electric power consumption W1 of the heat pump unit when selecting an air-water dual-source working state to generate the heat quantity Q0 required by the user side, that is, Q1 < Q0, Q3 < Q2, W2 < W1, the water temperature in the first water storage device has been lower than the fourth temperature threshold T4, the calculation control unit sends signals to the first circulation pump, the fourth electronic switching valve, the fifth electronic switching valve, the compressor motor, the fifth circulation pump, and the first electronic three-way valve, so that the first circulation pump and the fourth electronic switching valve are closed, the fifth electronic switching valve, the compressor motor, and the fifth circulation pump are kept open, and the B-C passage of the first electronic three-way valve is kept open, so that the heat pump unit enters a single air source working state; the hot water prepared by the heat pump unit is stored in the second water storage device, when the temperature feedback by the second temperature sensor is higher than the second temperature threshold T2, the calculation control unit sends signals to the second electronic switching valve and the sixth circulation pump: open the second electronic switching valve and the sixth circulation pump to supply heat to the user side, after releasing heat for heating at the user side, the return water returns to the water side of the condenser through the B-C passage of the first electronic three-way valve on the return water side pipeline of the second water storage device at the user side to continue absorbing heat, completing the entire heating cycle.

[0060] At this time, since Q1 < Q0, Q3 < Q2, W2 < W1, that is, the unit can meet the heating demand at a lower operating cost only when using a single air source working state, the air-water dual-source heat pump unit operates in a single air source working state. The specific process is as follows: the system closes the fourth electronic switching valve and opens the fifth electronic switching valve through the calculation control unit, so that the air-water dual-source heat pump only absorbs the heat of the surrounding air through the air-side evaporator, and the state of the refrigerant in the evaporator changes from a low-temperature and low-pressure liquid state to a low-temperature and low-pressure gaseous state. In addition, the circulation process and phase change process of the refrigerant in the heating cycle are the same as those in the aforementioned operation mode three. At the same time, in the condenser, the water in the second water storage device exchanges heat with the refrigerant in the heating cycle, and the hot water generated by the heat exchange is sent into the second water storage device through the fifth circulation pump. When the temperature feedback by the second temperature sensor is greater than the second temperature threshold T2, the system opens the second electronic switching valve and the sixth circulation pump, and sends the hot water that meets the heating needs into the user side. After releasing heat for heating at the user side, the return water returns to the water side of the condenser through the B-C passage of the first electronic three-way valve on the return water side pipeline of the second water storage device at the user side to continue absorbing heat, completing the entire heating cycle. At the same time, the first heat meter, the second heat meter, and the power sensor have been sending signals to the calculation control unit, and the calculation control unit also plays the same role as in operation mode three.

[0061] The following magnitude relationships exist among the above-mentioned first temperature threshold T1, second temperature threshold T2, third temperature threshold T3, and fourth temperature threshold T4: T4 < T3 < T2 < T1. The following magnitude relationship exists between the preset excess heat ΔQ and the heat Q0 required by the user side: ΔQ ≥ Q0.

[0062] Specifically, when the heat pump unit operates in a single water source working state, the heat Q2 that needs to be absorbed from the water side to generate the heat Q0 required by the user side is calculated according to the following formula:

[0063] Q2 = (Q0 - Q4) - W water ·t - Q loss

[0064] In the formula:

[0065] Q0 —— The heat required by the user side;

[0066] Q2 —— The heat that needs to be absorbed from the water side when the heat pump unit operates in a single water source working state to generate Q0;

[0067] Q4 —— The heat of the water in the second water storage device;

[0068] W water —— The power of the heat pump unit when it operates in a single water source working state;

[0069] t —— The time required to generate the heat required by the user side;

[0070] Q loss —— The heat loss of the heating cycle when the heat pump unit operates in a single water source working state.

[0071] Furthermore, the heat Q3 that needs to be released when the hot water in the first water storage device cools down to 5°C is calculated according to the following formula:

[0072] Q3 = cm(T (1) - 5)

[0073] In the formula:

[0074] c —— The specific heat capacity of water;

[0075] m —— The mass of the water in the first water storage device;

[0076] T (1) —— The temperature of the water in the first water storage device;

[0077] Furthermore, when the heat pump unit operates in an air-water dual-source working state, the consumed electric power W1 for generating the heat Q0 required by the user side is calculated according to the following formula:

[0078]

[0079] In the formula:

[0080] Q0——the heat required by the user end;

[0081] COP dual ——The COP of the heat pump unit when the heat pump unit is operating in air-water dual-source working state;

[0082] W1 is the electric power consumed by Q0 heat generated when the heat pump unit operates in air-water dual-source working state.

[0083] Furthermore, when the heat pump unit operates in a single air source working state, the heat Q0 required by the user end and the consumed electric power W2 is calculated as follows:

[0084]

[0085] Where:

[0086] Q0——the heat required by the user end;

[0087] COP air ——The COP of the heat pump unit when the heat pump unit is operating in a single air source working state;

[0088] W2 is the electric power consumed by the heat generated by Q0 when the heat pump unit operates in a single air source working state.

[0089] The calculation of all the above key parameters is carried out in the calculation control unit, and the size relationship of the key parameters is determined in the calculation control unit, so as to select the corresponding operation mode for the heating system.

[0090] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, a variety of simple modifications can be made to the technical solution of the present invention, and these simple modifications all belong to the protection scope of the present invention.

[0091] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

[0092] In addition, various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.

Claims

1. An air-water dual heat source heat pump heating system, characterized in that: The invention comprises a solar heat collection source (17), a heat exchanger (11), a first water storage device (1), a second water storage device (7), an air-water dual heat source heat pump unit, a user end (8) and a calculation control unit (29); the air-water dual heat source heat pump unit comprises a water side evaporator (2), an air side evaporator (3), a compressor (4.1), a compressor motor (4.2), a condenser (5), an expansion valve (6), a fourth electronic switching valve (18) and a fifth electronic switching valve (19); The solar heat collection heat source (17) can absorb solar heat and heat the solar heat collection circulating medium, and the solar heat collection circulating medium exchanges heat with the water in the first water storage device (1) through the heat exchanger (11) to increase the temperature of the water in the first water storage device (1); On the pipeline connecting the heat exchanger (11) and the first water storage device (1), the first circulating water pump (24), the first heat meter temperature sensor II (13.2), the heat exchanger (11) and the first heat meter temperature sensor I (13.1) are arranged in order according to the water flow direction; the first heat meter temperature sensor II (13.2) and the first heat meter temperature sensor I (13.1) are connected to the first heat meter (13); The first water storage device (1) and the second water storage device (7) are connected via a first heat exchange coil (9) provided in the first water storage device (1) and a second heat exchange coil (10) provided in the second water storage device (7); a circulating medium in the connected pipeline exchanges heat; and a third electronic switching valve (20) and a fourth circulating pump (25) are provided on the pipeline in the order of the flow of the circulating medium; The air-water dual heat source heat pump unit is connected to a first water storage device (1), a water side evaporator (2) is arranged in the first water storage device (1), the water side evaporator (2) is connected in series with an expansion valve (6), a condenser (5), and a compressor (4.1), and the air side evaporator (3) is placed in the surrounding air and connected in parallel with the water side evaporator (2); the condenser (5) of the air-water dual heat source heat pump unit is connected to a second water storage device (7); on the return pipe connecting the condenser (5) and the second water storage device (7), the fifth circulating water pump (26), the second heat meter temperature sensor I (14.1), the condenser (5) and the second heat meter temperature sensor II (14.2) are arranged in sequence according to the water flow direction; the second heat meter (14) is connected between the second heat meter temperature sensor I (14.1) and the second heat meter temperature sensor II (14.2); the first water storage device (1) and the second water storage device (7) are respectively connected to a user end (8); The calculation control unit (29) controls the start and stop of the air-water dual heat source heat pump unit, valves and water pump by reading the temperature data of the first temperature sensor (12) of the first water storage device (1) and the second temperature sensor (15) of the second water storage device (7) and the heat data of the first heat meter (13) and the second heat meter (14), and selects a suitable operation mode of the heating system to achieve the purpose of operation control; at the same time, the calculation control unit (29) can monitor the surrounding meteorological data and read the data of the power sensor (16) connected to the compressor motor (4.2), and calculate the system energy consumption and economy in combination with the heat data, thereby optimizing the system operation mode.

2. The air-water dual heat source heat pump heating system according to claim 1, characterized in that: The fourth electronic switching valve (18) is arranged on the pipeline connected to the water-side evaporator (2), and the fifth electronic switching valve (19) is arranged on the pipeline connected to the air-side evaporator (3), and is used to adjust the working state of the heat pump unit.

3. The air-water dual heat source heat pump heating system according to claim 1, characterized in that: A first electronic switching valve (23) and a second circulating water pump (28) are provided on the pipeline connecting the first water storage device (1) and the user end (8) according to the direction of water flow; and a second electronic switching valve (21) and a sixth circulating water pump (27) are provided on the pipeline connecting the second water storage device (7) and the user end (8) according to the direction of water flow.

4. The air-water dual heat source heat pump heating system according to claim 1, characterized in that: The water on the second water storage device (7) side of the condenser (5) comes from the return water of the BC passage of the first electronic three-way valve (22) on the pipeline connected to the second water storage device (7) after flowing through the user end (8); the return water pipeline is connected to the second water storage device (7) after heat exchange with the condenser (5); and the BA passage of the first electronic three-way valve (22) directly returns to the second water storage device (7).

5. The air-water dual heat source heat pump heating system operation control method according to claim 1, characterized in that: The method can control and realize multiple operation modes of independent or combined heating of hot water generated by heat exchange of solar thermal heat source and air-water dual-source heat pump unit, use air-water dual-source heat pump unit as core equipment for heating, send the heat of hot water in the first water storage equipment that does not meet the heating demand into the water-side evaporator of the air-water dual-source heat pump unit, generate hot water meeting the heating temperature through the single water source working state or the air-water dual-source working state of the heat pump unit, or only absorb the heat of the surrounding air and generate hot water meeting the heating temperature through the single air source working state of the heat pump unit. Water; the parameters involved in the control method include: the heat Q1 exchanged to the first water storage device through the heat exchanger, the heat Q0 required by the user end, the preset excess heat ΔQ, the heat Q2 that the water-side evaporator needs to absorb when the heat pump unit uses a single water source working state to generate the heat Q0 required by the user end, the heat Q3 that needs to be released when the hot water in the first water storage device is cooled to 5°C, the electric power W1 consumed by the heat pump unit when selecting the air-water dual-source working state to generate the heat Q0 required by the user end, and the electric power W2 consumed by the heat pump unit when selecting the single air source working state to generate the heat Q0 required by the user end.

6. The air-water dual heat source heat pump heating system operation control method according to claim 5, characterized in that: It includes controlling to implement operating mode 1: When Q1 > Q0 + ΔQ, the water temperature in the first water storage device exceeds the first temperature threshold T1. The calculation and control unit turns on the third electronic switching valve and the fourth circulation pump, so that the hot water in the first water storage device exchanges heat with the hot water in the second water storage device through the circulating working medium in the pipeline between the first heat exchange coil and the second heat exchange coil; When the temperature feedback by the second temperature sensor exceeds the second temperature threshold T2, the calculation and control unit turns on the second electronic switching valve and the sixth circulation water pump, and switches the first electronic three-way valve to the B-A path, and sends the hot water in the second heat exchange device into the user side for heating through the sixth circulation water pump. After the return water on the second water storage device side of the user side after heating flows through the B-A path of the first electronic three-way valve, it flows into the second water storage device to complete the entire heating cycle.

7. The air-water dual heat source heat pump heating system operation control method according to claim 5, characterized in that: It includes controlling to implement operating mode 2: When Q0 < Q1 < Q0 + ΔQ, the water temperature in the first water storage device is higher than the second temperature threshold T2 and lower than the first temperature threshold T1. The calculation and control unit closes the third electronic switching valve, the fourth circulation pump, the sixth circulation water pump and the second electronic switching valve, turns on the first electronic switching valve and the second circulation pump, keeps the first circulation pump on, and adjusts the first electronic three-way valve to the B-C path. The hot water is directly sent into the user side through the second circulation pump. After heating the user in the user side, the return water returns to the first water storage device through the return water end of the first water storage device to complete the entire heating cycle.

8. The air-water dual heat source heat pump heating system operation control method according to claim 5, characterized in that: It includes controlling to implement operating mode 3: When Q1 < Q0, the heat pump is used to meet the heating demand: When Q2 < Q3, the water temperature in the first water storage device is higher than the third temperature threshold T3 and lower than the second temperature threshold T2. The calculation and control unit closes the first electronic switching valve and the second circulation pump, turns on the compressor motor, the fourth electronic switching valve and the fifth circulation pump, keeps the first electronic three-way valve in the B-C path and the fifth electronic switching valve closed, so that the heat pump unit enters the single water source working state; The hot water prepared by the heat pump unit is stored in the second water storage device. When the temperature feedback by the second temperature sensor is higher than the second temperature threshold T2, the calculation and control unit turns on the second electronic switching valve and the sixth circulation water pump. The water meeting the heating requirements is sent into the user side through the sixth circulation water pump, and after heating, it returns to the condenser for heat exchange through the B-C path of the first electronic three-way valve on the return water side of the second water storage device to complete the entire heating cycle.

9. The air-water dual heat source heat pump heating system operation control method according to claim 5, characterized in that: Including control to achieve operating mode four: When Q1 < Q0, Q3 < Q2, and W1 < W2, the water temperature in the first water storage device is higher than the fourth temperature threshold T4 and lower than the third temperature threshold T3. The fifth electronic switching valve is opened, the fourth electronic switching valve, the compressor motor, and the fifth circulation pump are kept open, and the first electronic three-way valve is kept open in the B-C path, so that the heat pump unit enters the air-water dual-source working state; The hot water prepared by the air-water dual-source heat pump is stored in the second water storage device. When the temperature feedback by the second temperature sensor is higher than the second temperature threshold T2, the calculation control unit opens the second electronic switching valve and the sixth circulation pump to supply heat to the user end. After releasing heat for heating at the user end, the return water returns to the condenser water side of the second water storage device through the B-C path of the first electronic three-way valve on the return water side pipeline of the second water storage device at the user end to continue absorbing heat, completing the entire heating cycle.

10. The air-water dual heat source heat pump heating system operation control method according to claim 5, characterized in that: Including control to achieve operating mode five: When Q1 < Q0, Q3 < Q2, and W2 < W1, the water temperature in the first water storage device is already lower than the fourth temperature threshold T4. The calculation control unit closes the first circulation pump and the fourth electronic switching valve, keeps the fifth electronic switching valve, the compressor motor, and the fifth circulation pump open, and keeps the first electronic three-way valve open in the B-C path, so that the heat pump unit enters the single air source working state; The hot water prepared by the heat pump unit is stored in the second water storage device. When the temperature feedback by the second temperature sensor is higher than the second temperature threshold T2, the calculation control unit opens the second electronic switching valve and the sixth circulation pump to supply heat to the user end. After releasing heat for heating at the user end, the return water returns to the condenser water side through the B-C path of the first electronic three-way valve on the return water side pipeline of the second water storage device at the user end to continue absorbing heat, completing the entire heating cycle.

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