Control system and method for coupling photovoltaic photo-thermal integrated device with air source heat pump

Abstract

The invention provides a photovoltaic and photo-thermal integrated device coupling air source heat pump control system and method. The system comprises a photovoltaic and photo-thermal integrated device, an air source heat pump, a heat storage water tank, a control system, a water circulation system and a sensor acquisition system, the sensor acquisition system comprises a solar radiation sensor, an outlet water temperature sensor, an environment temperature sensor, a hot water tank temperature sensor and a return water temperature sensor; the control system is used for collecting and determining corresponding control strategies according to the environment temperature, the solar radiation intensity, the water temperature of the heat storage water tank, the water temperature of an outlet of the photovoltaic and photo-thermal integrated device and the water return temperature of the water return end of the user side water circulation system, and operation of the air source heat pump is controlled based on an air source heat pump starting strategy in the control strategies. And the reliability and the utilization rate of the heat pump control system are effectively improved.

Description

Technical Field

[0001] The present invention relates to the field of heat pump control, and in particular to a control system and method for a photovoltaic-thermal integrated device coupled with an air-source heat pump. Background Art

[0002] The use of renewable energy has received widespread attention. In the residential sector, hot water consumption accounts for a significant proportion of energy consumption. While traditional gas and electric water heaters are technologically mature, they suffer from high carbon emissions and low energy efficiency.

[0003] Air-source heat pumps (ASHPs) are a highly efficient heating technology that extracts heat from ambient air, offering high energy efficiency. However, in cold climates, the performance of ASHPs can significantly decline. Low temperatures reduce the heat exchange temperature difference on the evaporator side, reducing heating capacity and energy efficiency, and even leading to frost formation, requiring additional defrosting energy. To maintain heating capacity, auxiliary electric heating is often required, further reducing the overall energy efficiency of the system and limiting the widespread application of ASHPs in cold climates.

[0004] Photovoltaic thermal integration (PVT) combines photovoltaic power generation with thermal energy collection, effectively improving energy efficiency through the comprehensive utilization of solar energy. To overcome the performance shortcomings of air-source heat pumps in cold climates, air-source heat pumps are combined with solar energy technology.

[0005] While research on PVT and air-source heat pump hot water systems has yielded promising results, numerous limitations remain. In terms of system structure, PVT and air-source heat pumps lack compatibility, making it impossible to dynamically acquire control parameters. Control strategies often employ simple temperature thresholds or timing controls, which are unable to adapt to dynamic changes in solar radiation and ambient temperature. This makes it difficult to achieve optimal energy efficiency for coordinated system operation, resulting in low reliability and utilization of heat pump control.

[0006] Therefore, in order to solve the problems of low reliability and utilization of heat pump control systems in the prior art, this solution is proposed. Summary of the Invention

[0007] In order to solve the problems existing in the prior art, the present invention innovatively proposes a photovoltaic and thermal integrated device coupled with an air source heat pump control system and method, which effectively solves the problems of low reliability and utilization of the heat pump control system caused by the prior art, and effectively improves the reliability and utilization of the heat pump control system.

[0008] The first aspect of the present invention provides a photovoltaic-thermal integrated device coupled with an air source heat pump control system, comprising: a photovoltaic-thermal integrated device, an air source heat pump, a hot water storage tank, a control system, a water circulation system, and a sensor acquisition system, wherein the photovoltaic-thermal integrated device is used to absorb solar radiation and generate low-temperature hot water; the air source heat pump is used to absorb the heat generated by the photovoltaic-thermal integrated device and heat the cold water in the hot water storage tank by the generated heat; the water circulation system comprises a user-side water circulation system and a heat source-side water circulation system; the user-side water circulation system is used to transport the hot water in the hot water storage tank to the user end, and transport the return cold water from the user end to the hot water storage tank; the heat source-side water circulation system is used to circulate the cold water in the hot water storage tank to the air source heat pump and / or the photovoltaic-thermal integrated device for Heating, and returning the heated hot water to the heat storage tank; the heat storage tank is used to store cold water and deliver the heated hot water to the user end; the sensor acquisition system includes a solar radiation sensor arranged at the water supply end of the user-side water circulation system, an outlet water temperature sensor arranged at the outlet of the photovoltaic thermal integration device, an ambient temperature sensor arranged indoors and outdoors, a heat storage tank temperature sensor arranged inside the heat storage tank, and a return water temperature sensor arranged at the return water end of the user-side water circulation system; the control system is used to collect and determine the corresponding control strategy based on the ambient temperature, solar radiation intensity, heat storage tank water temperature, photovoltaic thermal integration device outlet water temperature, and return water temperature at the return water end of the user-side water circulation system, and control the operation of the air source heat pump based on the air source heat pump start-up strategy in the control strategy.

[0009] The second aspect of the present invention provides a control method for a photovoltaic-thermal integrated device coupled with an air source heat pump, which is implemented based on the photovoltaic-thermal integrated device coupled with an air source heat pump control system described in the first aspect of the present invention, and includes: The sensor acquisition system collects real-time data on ambient temperature, solar radiation intensity, water temperature in the heat storage tank, outlet water temperature of the photovoltaic and thermal integrated device, and return water temperature at the return end of the user-side water circulation system; The control system determines the corresponding control strategy based on the collected ambient temperature, solar radiation intensity, water temperature of the heat storage tank, outlet water temperature of the photovoltaic thermal integration device, and return water temperature of the return water end of the user-side water circulation system, and controls the operation of the air source heat pump based on the air source heat pump start-up strategy in the control strategy.

[0010] The technical solution adopted by the present invention includes the following technical effects: 1. The sensor acquisition system in the technical solution of the present invention includes a solar radiation sensor arranged at the water supply end of the user-side water circulation system, an outlet water temperature sensor arranged at the outlet of the photovoltaic thermal integration device, an ambient temperature sensor arranged indoors and outdoors, a hot water storage tank temperature sensor arranged inside the hot water storage tank, and a return water temperature sensor arranged at the return water end of the user-side water circulation system; the control system is used to collect and determine the corresponding control strategy based on the ambient temperature, solar radiation intensity, hot water storage tank water temperature, photovoltaic thermal integration device outlet water temperature, and return water temperature at the return water end of the user-side water circulation system, and controls the operation of the air source heat pump based on the air source heat pump start-up strategy in the control strategy, effectively solving the problems of low reliability and utilization of the heat pump control system caused by the existing technology, and effectively improving the reliability and utilization of the heat pump control system.

[0011] 2. In the technical solution of the present invention, the evaporator in the air source heat pump is used to absorb the heat in the low-temperature circulating cold water generated by the photovoltaic thermal integration device to generate gaseous refrigerant, and the generated gaseous refrigerant is transported to the condenser through the expansion valve; the condenser is used to liquefy the gaseous refrigerant, and use the heat generated by the liquefaction to heat the cold water in the condenser, thereby transporting the hot water to the heat storage tank, and the liquefied refrigerant is transported to the evaporator through the compressor; the PVT water outlet pipe is used to transport the low-temperature hot water generated by the photovoltaic thermal integration device to the evaporator water inlet pipe, or, to transport the high-temperature circulating hot water generated by the photovoltaic thermal integration device to the heat storage tank; the PVT water inlet pipe is used to transport the cold water in the evaporator water outlet pipe or the cold water in the heat storage tank to the photovoltaic thermal integration device; effectively improves the control accuracy and system responsiveness; the low-temperature heat energy generated by the photovoltaic thermal integration device is recycled and utilized by the air source heat pump, thereby avoiding energy waste of low-temperature hot water due to insufficient solar radiation.

[0012] 3. The control system in the technical solution of the present invention also includes: an electricity consumption system, the battery is used to store the electricity generated in the photovoltaic thermal integration device; the inverter is used to convert the direct current generated in the photovoltaic thermal integration into alternating current, and transmit the converted alternating current to the municipal power grid and the user system respectively, and convert the alternating current in the municipal power grid into direct current, and charge the battery with the converted direct current; the photovoltaic battery management system BMS is used to manage the charging and discharging process of the battery; the working mode of the photovoltaic battery management system BMS and the inverter can be controlled, so that the electricity generated by the photovoltaic thermal integration device is efficiently utilized, thereby improving the overall energy utilization efficiency of the system.

[0013] 4. In the technical solution of the present invention, a weighted threshold method is used to calculate the comprehensive index W based on the collected ambient temperature, solar radiation intensity, water temperature of the heat storage tank, outlet water temperature of the photovoltaic thermal integration device, and return water temperature of the return water end of the user-side water circulation system. According to the numerical range of the comprehensive index W, a hierarchical start-up logic is used to control the operation mode of the air source heat pump; the weight coefficients of the ambient temperature, solar radiation intensity and the change rate of the water temperature of the heat storage tank are dynamically adjusted according to the seasonal and regional climate characteristics or user preference presets. The working mode of the air source heat pump can be adjusted according to the real-time environment and solar radiation conditions and other influencing factors, thereby improving the reliability of system control.

[0014] 5. Before the weighted threshold method is used to calculate the comprehensive index W, the technical solution of the present invention also includes: determining the startup strategy of the auxiliary electric heater according to the water temperature of the hot water storage tank, thereby ensuring the reliability of the heat pump system control in cold areas.

[0015] 6. In the technical solution of the present invention, the hot water supply strategy of the photovoltaic thermal integration device is determined according to the outlet water temperature of the photovoltaic thermal integration device, and the heating object that provides hot water source for the heat storage tank is adjusted; the utilization rate of the heat pump system control is improved; the electronic control system determines the power supply strategy of the photovoltaic thermal integration device according to the battery capacity data sent by the photovoltaic battery management system BMS, thereby improving the overall energy comprehensive utilization efficiency of the system.

[0016] It should be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0018] Figure 1 This is a schematic diagram of the structure of the system in Example 1 of the present invention; Figure 2 This is a schematic structural diagram of a photovoltaic-thermal integrated device in a system according to a first embodiment of the present invention; Figure 3 This is a schematic diagram of the control flow of the hot water supply strategy, the auxiliary electric heater startup strategy, and the air source heat pump startup strategy in the system of Example 1 of the present invention; Figure 4 Schematic diagram (1) of the control flow of the power supply strategy of the photovoltaic-thermal integrated device in the system of Example 1 of the solution of the present invention; Figure 5Schematic diagram (II) of the control flow of the power supply strategy of the photovoltaic-thermal integrated device in the system of Example 1 of the solution of the present invention; Figure 6 This is a schematic flow chart of the method of Example 2 in the scheme of the present invention.

[0019] Photovoltaic and thermal integrated device (1): tempered glass (101), PV battery sheet (102), thermal conductive copper plate (103), thermal conductive copper tube (104), adhesive film (105), composite film (106), aluminum alloy frame (107); Heat pump system (2), evaporator (201), condenser (202), expansion valve (203), compressor (204); Heat storage tank (3), auxiliary electric heater (4), control system (5), water supply temperature sensor (6), solar radiation sensor (7) and flow sensor (8), first water pump (9), user return pipe (10), user terminal (11), condenser water inlet pipe (12), condenser water outlet pipe (13), user hot water pipe (14), first diverter valve (15), second diverter valve (16), second water pump (17), battery (18), inverter (19), photovoltaic battery management system BMS (20), outlet water temperature sensor (21), ambient temperature sensor (22), heat storage tank temperature sensor (23), return water temperature sensor (24), electronic control system (25), municipal power grid (26), evaporator water inlet pipe (27), evaporator water outlet pipe (28), PVT water outlet pipe (29), PVT water inlet pipe (30). DETAILED DESCRIPTION

[0020] In order to clearly illustrate the technical features of this solution, the present invention is described in detail below through specific implementation methods and in conjunction with the accompanying drawings. The disclosure below provides many different embodiments or examples for realizing different structures of the present invention. In order to simplify the disclosure of the present invention, the components and settings of specific examples are described below. In addition, the present invention may repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplicity and clarity and does not itself indicate the relationship between the various embodiments and / or settings discussed. It should be noted that the components illustrated in the accompanying drawings are not necessarily drawn to scale. The present invention omits descriptions of well-known components and processing technologies and processes to avoid unnecessary limitations on the present invention.

[0021] Example 1 like Figure 1As shown, the present invention provides a photovoltaic thermal integration device coupled with an air source heat pump control system, comprising: a photovoltaic thermal integration device 1, an air source heat pump 2, a hot water storage tank 3, a control system 5, a water circulation system, and a sensor acquisition system. The photovoltaic thermal integration device 1 is used to absorb solar radiation to generate low-temperature hot water; the air source heat pump 2 is used to absorb the heat generated by the photovoltaic thermal integration device 1, and heat the cold water in the hot water storage tank 3 by the generated heat; the water circulation system comprises a user-side water circulation system and a heat source-side water circulation system; the user-side water circulation system is used to transport the hot water in the hot water storage tank 3 to the user end, and transport the cold water returned from the user end to the hot water storage tank 3; the heat source-side water circulation system is used to circulate the cold water in the hot water storage tank 3 to the air source heat pump 2 or the photovoltaic thermal integration device 1 for heating, and The heated hot water is returned to the heat storage tank 3; the heat storage tank 3 is used to store cold water and deliver the heated hot water to the user end; the sensor acquisition system includes a solar radiation sensor 7 arranged at the water supply end of the user-side water circulation system, an outlet water temperature sensor 21 arranged at the outlet of the photovoltaic thermal integration device, an ambient temperature sensor 22 arranged indoors and outdoors, a heat storage tank temperature sensor 23 arranged inside the heat storage tank 3, and a return water temperature sensor 24 arranged at the return water end of the user-side water circulation system; the control system 5 is used to collect and determine the corresponding control strategy based on the ambient temperature, solar radiation intensity, heat storage tank water temperature, photovoltaic thermal integration device outlet water temperature, and return water temperature at the return water end of the user-side water circulation system, and control the operation of the air source heat pump 1 based on the air source heat pump start-up strategy in the control strategy.

[0022] The photovoltaic-thermal integrated device 1 includes, from top to bottom, tempered glass 101, adhesive film 105, PV battery cell 102, composite film 106, thermal conductive copper plate 103 and thermal conductive copper tube 104. The tempered glass 101 serves as a surface protection layer to provide physical protection and light transmission performance; the adhesive film 105 is used to encapsulate and fix the PV battery cell 102; the composite film 106 is used to provide moisture-proof protection and electrical isolation protection for the thermal conductive copper plate 103 and the thermal conductive copper tube 104; the thermal conductive copper plate 103 and the thermal conductive copper tube 104 form a heat conduction structure to realize heat extraction.

[0023] like Figure 2As shown, the integrated photovoltaic-thermal device 1 utilizes a liquid-cooled PVT assembly, using water as a cooling medium. Heat energy is removed through metal conduits or plates attached to the back of the photovoltaic panels. This absorbs solar radiation, heats the water storage tank, and generates electricity for the system. Adhesive film 105 can be an ethylene-vinyl acetate copolymer film, and composite film 106 can be a three-layer polyvinyl fluoride composite film or a TPT composite film. Tempered glass 101 serves as a surface protective layer, providing high-strength physical protection and light transmission. Adhesive film 105 encapsulates and secures the PV cells 102. Composite film 106 provides moisture and UV protection, as well as electrical isolation. The thermally conductive copper plate 103 and thermally conductive copper tube 104 form a highly efficient heat conduction structure, enabling rapid heat removal. The entire assembly is encapsulated and secured within a high-strength aluminum alloy frame 107.

[0024] The air source heat pump 2 includes an evaporator 201, a condenser 202, an expansion valve 204, and a compressor 203. The evaporator 201 is used to absorb the heat in the low-temperature circulating cold water generated by the photovoltaic and thermal integration device 1 to generate gaseous refrigerant, and transport the generated gaseous refrigerant to the condenser 202 through the expansion valve; the condenser 202 is used to liquefy the gaseous refrigerant, and use the heat generated by the liquefaction to heat the cold water in the condenser 202, thereby transporting the hot water to the hot water storage tank 3, and transporting the liquefied refrigerant to the evaporator 201 through the compressor 203; the air source heat pump 2 uses the environmentally friendly refrigerant R410a and has the ability to operate stably in a low-temperature environment.

[0025] The water circulation system on the heat source side includes a condenser water inlet pipe 12, a condenser water outlet pipe 13, an evaporator water inlet pipe 27, an evaporator water outlet pipe 28, a PVT water outlet pipe 29, a PVT water inlet pipe 30, a first diverter valve 15, and a second diverter valve 16; the condenser water inlet pipe 12 is used to circulate the cold water in the hot water storage tank 3 to the condenser 202 for heating, and the condenser water outlet pipe 13 is used to return the heated hot water to the hot water storage tank 3; the evaporator water inlet pipe 27 is used to transport the low-temperature circulating cold water generated by the photovoltaic thermal integration device (1) to the evaporator 201, and the evaporator water outlet pipe 28 is used to transport the low-temperature circulating cold water in the evaporator 201 to the photovoltaic thermal integration device 1; the PVT water outlet pipe 29 is used to transport the low-temperature hot water generated by the photovoltaic thermal integration device 1 to the evaporator The evaporator water inlet pipe 27 is used to transport the high-temperature circulating hot water generated by the photovoltaic thermal integration device 1 to the water storage tank 3; the PVT water inlet pipe 30 is used to transport the cold water in the evaporator water outlet pipe 28 or the cold water in the water storage tank 3 to the photovoltaic thermal integration device 1; the first diverter valve 15 is arranged between the PVT water outlet pipe 29 and the evaporator water inlet pipe 27, and is used to transport the low-temperature circulating cold water generated by the photovoltaic thermal integration device 1 to the evaporator water inlet pipe 27, or to transport the high-temperature circulating hot water generated by the photovoltaic thermal integration device 1 to the water storage tank 3; the second diverter valve 16 is arranged between the PVT water inlet pipe 30 and the evaporator water outlet pipe 28, and is used to transport the circulating cold water return water generated by the water storage tank 3 and the evaporator 201 to the photovoltaic thermal integration device 1.

[0026] The air-source heat pump 2 is primarily used to circulate cold water from the hot water storage tank 3 to the condenser 202 for heating, return the heated hot water to the hot water storage tank 3, and deliver the hot water to the user terminal 11. It is also used to recover waste heat. The low-temperature hot water generated by the photovoltaic-thermal integrated device 1 is used to exchange heat with the low-temperature refrigerant in the evaporator 201, thereby raising the evaporation temperature, reducing the risk of condensation, and improving the efficiency of the air-source heat pump.

[0027] The user-side water circulation system includes a first water pump 9, a user return pipe 10, a user hot water pipe 14, and a user terminal 11. The first water pump 9 is installed on the user return pipe 10 and is used to transport the return water from the user terminal 11 to the hot water storage tank 3. The user hot water pipe 14 is used to transport hot water from the hot water storage tank 3 to the user terminal 11. The user terminal 11 may include air conditioning terminal equipment and user electrical equipment.

[0028] The hot water storage tank 3 is used to store hot water and provide a stable hot water supply. The hot water storage tank 3 is preferably a stratified hot water storage tank to improve heat storage efficiency, and is equipped with an auxiliary electric heater 4 to provide supplementary heating when solar energy and heat pump heating are insufficient.

[0029] Preferably, the sensor acquisition system further includes a water supply temperature sensor 6 and a flow sensor 8 provided at the water supply end of the user-side water circulation system, which can obtain the water temperature and water flow of the water storage tank.

[0030] Control system 5 can utilize a programmable logic controller (PLC) equipped with a sensor data collection system to collect parameters such as ambient temperature, solar radiation intensity, water temperature in the heat storage tank, water flow rate, and water temperature, and display them on the control system 5. This system then controls the operation of air-source heat pump 2 and auxiliary electric heater 4 according to a pre-set intelligent control strategy. The core of the control system lies in the intelligent control strategy, which includes temperature and solar radiation intensity threshold control, power consumption control, and other aspects.

[0031] Preferably, a photovoltaic-thermal integrated device coupled with an air source heat pump control system also includes: an electricity consumption system, the electricity consumption system includes a battery 18, an inverter 19, a photovoltaic battery management system BMS20, an electronic control system 25, and a municipal power grid 26, the battery 18 is used to store the electricity generated in the photovoltaic-thermal integrated device 1; the inverter 19 is used to convert the direct current generated in the photovoltaic-thermal integrated device into alternating current, and transmit the converted alternating current to the municipal power grid 26 and the user system respectively, and convert the alternating current in the municipal power grid 26 into direct current, and charge the battery 18 with the converted direct current; the photovoltaic battery management system BMS20 is used to manage the charging and discharging process of the battery 18; the electronic control system 25 is arranged in the user's room, and is communicated with the photovoltaic battery management system BMS20 and the inverter 19 respectively, and is used to control the working operation mode of the photovoltaic battery management system BMS20 and the inverter 19.

[0032] The control strategies of the control system 5 in this embodiment include an air source heat pump startup strategy, a hot water storage tank electric auxiliary heating startup control strategy, and a photovoltaic and thermal integrated device hot water supply strategy.

[0033] Among them, such as Figure 3 As shown, the specific startup strategy of the air source heat pump is: Based on the collected ambient temperature, solar radiation intensity, and water temperature of the heat storage tank, the weighted threshold method is used to calculate the comprehensive index W. According to the numerical range of the comprehensive index W, the air source heat pump startup strategy is determined. Based on the air source heat pump startup strategy, the hierarchical startup logic is used to control the operation mode of the air source heat pump 2.

[0034] Among them, the weighted threshold method is used to calculate the comprehensive index W according to the collected ambient temperature, solar radiation intensity, and water temperature of the hot water storage tank: , , , , , in: The ambient temperature threshold for starting the air source heat pump 2 alone; The temperature threshold of the hot water storage tank when the air source heat pump 2 is started alone; The solar radiation intensity threshold value received by the PVT when the air source heat pump 2 is started alone; The system energy consumption threshold for the day when the air source heat pump 2 is started alone; 、 、 、 is the threshold judgment function; 、 、 are the weight coefficients of ambient temperature, solar radiation intensity and water temperature change rate of the hot water storage tank respectively; To collect ambient temperature in real time; is the solar radiation intensity; The water temperature of the hot water storage tank; The system energy consumption for the day (which can be calculated based on the current and voltage of the air source heat pump obtained by the control system, or obtained by other methods, which are not limited in this embodiment); 、 、 、 These are all thresholds set in advance; Among them, the weight coefficients of ambient temperature, solar radiation intensity and water temperature change rate of the hot water storage tank are dynamically adjusted according to the season, regional climate characteristics or user preference presets as follows: , , in: is the average outdoor ambient temperature in the i-th season; is the average solar radiation intensity of the i-th season; i=1, 2, 3, 4 represent spring, summer, autumn, and winter respectively; Weight coefficient of water temperature change rate of hot water storage tank Adjustments are made based on daily personnel feedback and operational data, with each adjustment increasing or decreasing with a preset adjustment step of 0.05.

[0035] Specifically, the ambient temperature threshold for starting ASHP operation alone can be set based on the climate conditions of different regions, the actual usage habits of users, and the characteristics of system equipment. , Heat storage tank temperature threshold , PVT receiving radiation intensity threshold , as well as the weight coefficients of ambient temperature, solar radiation intensity and water temperature change rate of the hot water storage tank 、 、 For example, in areas with cold winters and weak solar radiation, it is appropriate to lower the ambient temperature threshold for starting ASHP alone. and solar radiation intensity threshold At the same time, the weight coefficient is adjusted to increase the influence of ambient temperature on ASHP startup judgment; to better adapt to the changes in energy supply and demand in different seasons, and further improve the energy efficiency and operation stability of the system.

[0036] During the adaptive adjustment phase after the system is built, the weight coefficient is adjusted by collecting feedback from personnel on a daily basis, with a cycle of one week. The content includes whether the temperature of the hot water supply is appropriate, whether the supply is timely, and whether there are any abnormal conditions during the operation of the system. At the same time, the daily operation data of the system is recorded, such as ambient temperature, solar radiation intensity, water temperature changes in the heat storage tank, operating power and duration of the air source heat pump, etc. The weight coefficient is adjusted based on daily personnel feedback and operation data, and is increased or decreased by 0.05 each time. If the personnel feedback on the day is that the hot water supply is not timely, the weight coefficient of the water temperature change rate of the heat storage tank will be directly adjusted based on the personnel feedback. Make adjustments up or down.

[0037] Based on seasonal changes, the solar radiation intensity and ambient temperature vary greatly in different seasons, which have different effects on the system heating demand. In winter, when it is cold and the solar radiation is weak, the solar radiation intensity weight coefficient is automatically increased. Since the low ambient temperature in winter has a great impact on hot water supply, the ambient temperature weight coefficient is automatically increased. , when the temperature is low, the high power mode is activated in time to ensure hot water supply; in summer, when the ambient temperature is high and the solar radiation is strong, the solar radiation intensity weight coefficient is automatically reduced and ambient temperature weight coefficient .

[0038] Adjust according to regional climate characteristics. For example, in the northern region, the winter is long and cold, and the solar radiation is weak. The solar radiation intensity weight coefficient is automatically increased. and ambient temperature weight coefficient , to ensure the timely heating of the system. For example, in the southern region, where the summer is hot and the solar radiation is strong, the solar radiation intensity weight coefficient is automatically reduced. and ambient temperature weight coefficient , reduce the number of ASHP startups and reduce energy consumption.

[0039] According to user preference adjustment, users who have high requirements for the timeliness of hot water supply can appropriately increase the weight coefficient of the water temperature change rate of the hot water storage tank Users who have low requirements for the timeliness of hot water supply can appropriately reduce the weight coefficient of the water temperature change rate of the hot water storage tank The control system 5 obtains the average solar radiation intensity and average outdoor ambient temperature of each season in spring, summer, autumn and winter through historical data, and then the control system automatically calculates the system weight.

[0040] According to the numerical range of the comprehensive index W, the air source heat pump startup strategy is determined. Based on the air source heat pump startup strategy, the stratified startup logic is used to control the operation mode of the air source heat pump 2 as follows: when When the air source heat pump 2 is started and the high power operation mode of the air source heat pump is turned on, the water temperature of the hot water storage tank is quickly increased to ensure the timely supply of hot water; when When the air source heat pump 2 is started, the low power operation mode of the air source heat pump is turned on.

[0041] like Figure 1 As shown, the photovoltaic-thermal integrated device coupled with the air source heat pump control system further includes an auxiliary electric heater 4 provided inside the hot water storage tank for heating the cold water inside the hot water storage tank; the control strategy also includes a start-up strategy for the auxiliary electric heater 4; like Figure 3 As shown, before the weighted threshold method is used to calculate the comprehensive index W, the method further includes: determining the starting strategy of the auxiliary electric heater 4 according to the water temperature of the hot water storage tank, specifically: When the hot water tank is running, set the supply temperature Greater than the water temperature of the hot water tank , and the hot water tank is running to set the supply temperature Water temperature of hot water tank The difference between them is greater than the minimum temperature difference set for electric auxiliary heating (or ), start the air source heat pump 2 alone; When the hot water storage tank is running, set the supply temperature Greater than the water temperature of the hot water tank , and the hot water tank is running to set the supply temperature Water temperature of hot water tank The difference between them is not greater than the minimum temperature difference set for electric auxiliary heating (or ), and the system energy consumption on that day Not greater than the system energy consumption threshold for the day When the air source heat pump 2 and the auxiliary electric heater 4 are started respectively; and the operation mode of the air source heat pump is the low power operation mode; When the hot water storage tank is running, set the supply temperature Not greater than the water temperature of the hot water tank , control the air source heat pump 2 to stop heating (the air source heat pump runs alone for heating), or the air source heat pump 2 and the auxiliary electric heater 4 both stop heating (the air source heat pump and the auxiliary electric heater both run for heating).

[0042] like Figure 3 As shown, before determining the startup strategy of the auxiliary electric heater according to the water temperature of the hot water storage tank, it also includes: determining the hot water supply strategy of the photovoltaic thermal integration device 1 according to the outlet water temperature of the photovoltaic thermal integration device, specifically: When the outlet water temperature of the photovoltaic thermal integrated device Lower than the return water temperature of the water circulation system on the user side When the low-temperature circulating cold water produced by the photovoltaic-thermal integrated device 1 is introduced into the evaporator 201 in the air source heat pump 2, the cold energy released by the evaporator 201 in the air source heat pump 2 is absorbed through the heat exchange process; When the outlet water temperature of the photovoltaic thermal integrated device Not less than the return water temperature of the return water end of the user side water circulation system When the hot water is heated, the high-temperature circulating hot water produced by the photovoltaic-thermal integrated device 1 is introduced into the hot water storage tank 3 to provide heat for the hot water storage tank.

[0043] The heat exchange process is specifically as follows: the evaporator 201 is used to absorb the heat in the low-temperature circulating cold water generated by the photovoltaic thermal integration device 1 to generate gaseous refrigerant, and the generated gaseous refrigerant is transported to the condenser 202 through the expansion valve; the condenser 202 is used to liquefy the gaseous refrigerant, and use the heat generated by the liquefaction to heat the cold water in the condenser 202, thereby transporting the hot water to the hot water storage tank 3, and the liquefied refrigerant is transported to the evaporator 201 through the compressor 203.

[0044] Specifically, when the user terminal 11 has a heat load demand, the control system 5 determines the current temperature of the hot water storage tank. Greater than the set temperature of the hot water tank , the hot water storage tank 3 starts to supply hot water to the user terminal 11 through the user hot water pipe 27, and the user return water returns to the hot water storage tank 3 through the user return pipe 10 and the first water pump 9. Lower than the set temperature of the hot water storage tank , start the air source heat pump system or auxiliary electric heater.

[0045] Affected by the dynamic changes of environmental factors, the photovoltaic-thermal integrated device 1 has limitations in the stability of hot water supply and is difficult to continuously output hot water that meets demand. Therefore, an in-depth evaluation of its hot water supply performance was carried out. Greater than the return water temperature at the user end 11 When the first diverter valve 15 is adjusted, the relatively hot water generated by the photovoltaic thermal integration device 1 is supplied to the hot water storage tank 3 through the PVT outlet pipe 29. Less than the return water temperature at the user end 11 When the first diverter valve 15 is adjusted, the relatively hot water generated by the photovoltaic thermal integration device 1 flows to the evaporator 201 through the evaporator water inlet pipe 27, taking away the cooling capacity of the evaporator, and the relatively low-temperature hot water returns to the photovoltaic thermal integration device 1 through the evaporator water outlet pipe 28, the second diverter valve 16, the second water pump 17, and the PVT water inlet pipe 30, thereby improving the heating performance of the heat pump unit.

[0046] Furthermore, the control system 5 determines the start and stop strategy of the air source heat pump. and the temperature of the hot water tank The temperature difference is greater than the minimum temperature difference for starting electric auxiliary heating In order to improve energy efficiency, the air source heat pump 2 is turned on separately and the auxiliary electric heater 4 is turned off. and the temperature of the hot water tank The temperature difference is less than the minimum temperature difference for starting electric auxiliary heating When, and the system energy consumption on that day When the energy consumption of the system is less than the set daily threshold, the air source heat pump 2 and the auxiliary electric heater 4 are started at the same time to further accelerate the temperature of the hot water storage tank. Meet the set temperature of the hot water storage tank .

[0047] When the air source heat pump is turned on, the condenser 202 supplies hot water to the hot water storage tank 3 through the condenser outlet pipe 13, and the low-temperature return water in the hot water storage tank 3 enters the condenser 202 through the condenser inlet pipe 12 for heat exchange. Furthermore, the control system 5 determines the operating mode of the air source heat pump 2 and calculates the comprehensive index based on the input setting parameters and the real-time monitoring parameters of the sensor. ,when When it is equal to 0, the air source heat pump low power mode is started to reduce the power consumption. When it is not equal to 0, the air source heat pump low-high rate mode is started to quickly make the temperature of the hot water storage tank reach the temperature range near the set temperature of the hot water storage tank, thereby improving the timeliness of the water supply system.

[0048] Furthermore, if Figure 4-Figure 5 As shown in FIG, the electronic control system determines the power supply strategy of the photovoltaic and thermal integrated device based on the battery capacity data sent by the photovoltaic battery management system BMS, specifically: The electric control system obtains the user's current input of the user's system power demand (It can also include electricity demand of water storage tanks and heat pump units, etc.), real-time electricity charges 、Peak and valley electricity charges of the day (can be obtained through wireless network or human-computer interaction module), and the photovoltaic instantaneous power generation can be obtained through the photovoltaic battery management system BMS , battery capacity SOC; When the instantaneous photovoltaic power generation Greater than the user system power demand When the SOC of the battery capacity is greater than the first preset threshold (for example, 95%), the surplus electricity generated by the photovoltaic and thermal integrated device will be sold to the municipal power grid; when the SOC of the battery capacity is not greater than the first preset threshold, if the real-time electricity fee is Peak and valley electricity charges of the day If the power is equal, the battery is charged using the municipal power grid; When the instantaneous photovoltaic power generation Not greater than the user's system power demand When the battery capacity is less than the first preset threshold (for example, 95%) and greater than the second preset threshold (for example, 5%), if the battery capacity is less than the first preset threshold and greater than the second preset threshold ( ), the battery supplies power to the user system; if the battery capacity is not less than the first preset threshold, or not greater than the second preset threshold, determine whether the battery capacity is not greater than the second preset threshold, if the battery capacity is not greater than the second preset threshold ( ), use the municipal power grid to charge the battery; if the battery capacity is greater than the second preset threshold ( ), the battery supplies power to the user system.

[0049] Specifically, when the user terminal 11 and the air source heat pump 2 have electricity demand, the electric control system 25 counts the real-time electricity demand. , the photovoltaic battery management system BMS20 obtains real-time photovoltaic power generation , battery load state SOC. When the real-time photovoltaic power generation Greater than real-time power demand , the photovoltaic and thermal integrated device 1 will give priority to supplying power to the air source heat pump 2 and the user terminal 11, and the surplus power will be charged to the battery 18. When the battery load state SOC is greater than 95%, the surplus power will be sold to the municipal power grid 26. Less than the real-time power demand , it is necessary to consider whether to supply power from the battery 18 or the municipal power grid 26. When the battery load state SOC is greater than 5% and less than 95%, the battery (18) is preferred to supply power to the user terminal 11 and the air source heat pump 2. When the battery load state SOC is less than 5%, it switches to the municipal power grid 26 for municipal power supplement.

[0050] Battery peak and valley storage mode, through the electronic control system 25 network, real-time monitoring of peak and valley electricity prices Time, when real-time electricity charges When the electricity rate is equal to the peak-valley rate, if the battery 18 is less than 95%, the municipal grid will charge the battery until the battery is greater than 95%.

[0051] The sensor acquisition system in the technical solution of the present invention includes a solar radiation sensor arranged at the water supply end of the user-side water circulation system, an outlet water temperature sensor arranged at the outlet of the photovoltaic thermal integration device, an ambient temperature sensor arranged indoors and outdoors, a hot water tank temperature sensor arranged inside the hot water storage tank, and a return water temperature sensor arranged at the return water end of the user-side water circulation system; the control system is used to collect and determine the corresponding control strategy based on the ambient temperature, solar radiation intensity, hot water tank water temperature, photovoltaic thermal integration device outlet water temperature, and return water temperature at the return water end of the user-side water circulation system, and controls the operation of the air source heat pump based on the air source heat pump start-up strategy in the control strategy, effectively solving the problems of low reliability and utilization of the heat pump control system caused by the existing technology, and effectively improving the reliability and utilization of the heat pump control system.

[0052] In the technical solution of the present invention, the evaporator in the air source heat pump is used to absorb the heat in the low-temperature circulating cold water generated by the photovoltaic thermal integration device to generate gaseous refrigerant, and the generated gaseous refrigerant is transported to the condenser through the expansion valve; the condenser is used to liquefy the gaseous refrigerant, and use the heat generated by the liquefaction to heat the cold water in the condenser, thereby transporting the hot water to the heat storage tank, and the liquefied refrigerant is transported to the evaporator through the compressor; the PVT outlet pipe is used to transport the low-temperature hot water generated by the photovoltaic thermal integration device to the evaporator inlet pipe, or to transport the high-temperature circulating hot water generated by the photovoltaic thermal integration device to the heat storage tank; the PVT inlet pipe is used to transport the cold water in the evaporator outlet pipe or the cold water in the heat storage tank to the photovoltaic thermal integration device; effectively improves the control accuracy and system responsiveness; the low-temperature heat energy generated by the photovoltaic thermal integration device is recycled and utilized by the air source heat pump, thereby avoiding energy waste of low-temperature hot water due to insufficient solar radiation.

[0053] The control system in the technical solution of the present invention also includes: an electricity consumption system, the battery is used to store the electricity generated in the photovoltaic and thermal integration device; the inverter is used to convert the direct current generated in the photovoltaic and thermal integration into alternating current, and transmit the converted alternating current to the municipal power grid and the user system respectively, and convert the alternating current in the municipal power grid into direct current, and charge the battery with the converted direct current; the photovoltaic battery management system BMS is used to manage the charging and discharging process of the battery; the working mode of the photovoltaic battery management system BMS and the inverter can be controlled, so that the electricity generated by the photovoltaic and thermal integration device is efficiently utilized, thereby improving the overall energy utilization efficiency of the system.

[0054] In the technical solution of the present invention, a weighted threshold method is used to calculate the comprehensive index W based on the collected ambient temperature, solar radiation intensity, water temperature of the heat storage tank, water temperature at the outlet of the photovoltaic thermal integration device, and return water temperature at the return water end of the user-side water circulation system. According to the numerical range of the comprehensive index W, a hierarchical start-up logic is used to control the operation mode of the air source heat pump; the weight coefficients of the ambient temperature, solar radiation intensity and the change rate of the water temperature of the heat storage tank are dynamically adjusted according to the seasonal and regional climate characteristics or user preference presets, and the working mode of the air source heat pump can be adjusted according to influencing factors such as the real-time environment and solar radiation conditions, thereby improving the reliability of system control.

[0055] Before the weighted threshold method is used to calculate the comprehensive index W, the technical solution of the present invention also includes: determining the startup strategy of the auxiliary electric heater according to the water temperature of the hot water storage tank, thereby ensuring the reliability of the heat pump system control in cold areas.

[0056] In the technical solution of the present invention, the hot water supply strategy of the photovoltaic thermal integration device is determined according to the outlet water temperature of the photovoltaic thermal integration device, and the heating object that provides hot water source for the heat storage tank is adjusted; the utilization rate of the heat pump system control is improved; the electronic control system determines the power supply strategy of the photovoltaic thermal integration device according to the battery capacity data sent by the photovoltaic battery management system BMS, thereby improving the overall energy comprehensive utilization efficiency of the system.

[0057] Example 2 like Figure 6 As shown, the technical solution of the present invention also provides a photovoltaic-thermal integrated device coupled with an air source heat pump control method, which is implemented based on a photovoltaic-thermal integrated device coupled with an air source heat pump control system in Example 1, including: S1, the sensor acquisition system collects real-time data on ambient temperature, solar radiation intensity, water temperature in the heat storage tank, outlet water temperature of the photovoltaic and thermal integrated device, and return water temperature at the return end of the user-side water circulation system; Among them, in step S1, the solar radiation sensor arranged at the water supply end of the user-side water circulation system collects the solar radiation intensity in real time, the outlet water temperature sensor arranged at the outlet of the photovoltaic thermal integration device collects the outlet water temperature of the photovoltaic thermal integration device in real time, the outdoor temperature sensors arranged indoors and outdoors collect the indoor and outdoor temperatures in real time, the hot water storage tank temperature sensor arranged inside the hot water storage tank collects the hot water storage tank water temperature in real time, and the return water temperature sensor arranged at the return water end of the user-side water circulation system collects the return water temperature of the return water end of the user-side water circulation system in real time.

[0058] S2, the control system determines the corresponding control strategy based on the collected ambient temperature, solar radiation intensity, water temperature of the heat storage tank, outlet water temperature of the photovoltaic thermal integration device, and return water temperature of the return water end of the user-side water circulation system, and controls the operation of the air source heat pump based on the air source heat pump start-up strategy in the control strategy.

[0059] Among them, in step S2, the control strategy of the control system in this embodiment includes the air source heat pump startup strategy, the electric auxiliary heating startup control strategy of the hot water storage tank, the hot water supply strategy of the photovoltaic thermal integrated device, and the control strategy of the photovoltaic power generation and municipal power supply system.

[0060] Among them, the execution process of the air source heat pump startup strategy, the electric auxiliary heating startup control strategy of the hot water storage tank, and the hot water supply strategy of the photovoltaic thermal integrated device (such as Figure 3 The steps are consistent with those in Example 1 and will not be described in detail in this embodiment.

[0061] The sensor acquisition system in the technical solution of the present invention includes a solar radiation sensor arranged at the water supply end of the user-side water circulation system, an outlet water temperature sensor arranged at the outlet of the photovoltaic thermal integration device, an ambient temperature sensor arranged indoors and outdoors, a hot water tank temperature sensor arranged inside the hot water storage tank, and a return water temperature sensor arranged at the return water end of the user-side water circulation system; the control system is used to collect and determine the corresponding control strategy based on the ambient temperature, solar radiation intensity, hot water tank water temperature, photovoltaic thermal integration device outlet water temperature, and return water temperature at the return water end of the user-side water circulation system, and controls the operation of the air source heat pump based on the air source heat pump start-up strategy in the control strategy, effectively solving the problems of low reliability and utilization of the heat pump control system caused by the existing technology, and effectively improving the reliability and utilization of the heat pump control system.

[0062] In the technical solution of the present invention, the evaporator in the air source heat pump is used to absorb the heat in the low-temperature circulating cold water generated by the photovoltaic thermal integration device to generate gaseous refrigerant, and the generated gaseous refrigerant is transported to the condenser through the expansion valve; the condenser is used to liquefy the gaseous refrigerant, and use the heat generated by the liquefaction to heat the cold water in the condenser, thereby transporting the hot water to the heat storage tank, and the liquefied refrigerant is transported to the evaporator through the compressor; the PVT outlet pipe is used to transport the low-temperature hot water generated by the photovoltaic thermal integration device to the evaporator inlet pipe, or to transport the high-temperature circulating hot water generated by the photovoltaic thermal integration device to the heat storage tank; the PVT inlet pipe is used to transport the cold water in the evaporator outlet pipe or the cold water in the heat storage tank to the photovoltaic thermal integration device; effectively improves the control accuracy and system responsiveness; the low-temperature heat energy generated by the photovoltaic thermal integration device is recycled and utilized by the air source heat pump, thereby avoiding energy waste of low-temperature hot water due to insufficient solar radiation.

[0063] The control system in the technical solution of the present invention also includes: an electricity consumption system, the battery is used to store the electricity generated in the photovoltaic and thermal integration device; the inverter is used to convert the direct current generated in the photovoltaic and thermal integration into alternating current, and transmit the converted alternating current to the municipal power grid and the user system respectively, and convert the alternating current in the municipal power grid into direct current, and charge the battery with the converted direct current; the photovoltaic battery management system BMS is used to manage the charging and discharging process of the battery; the working mode of the photovoltaic battery management system BMS and the inverter can be controlled, so that the electricity generated by the photovoltaic and thermal integration device is efficiently utilized, thereby improving the overall energy utilization efficiency of the system.

[0064] In the technical solution of the present invention, a weighted threshold method is used to calculate the comprehensive index W based on the collected ambient temperature, solar radiation intensity, water temperature of the heat storage tank, water temperature at the outlet of the photovoltaic thermal integration device, and return water temperature at the return water end of the user-side water circulation system. According to the numerical range of the comprehensive index W, a hierarchical start-up logic is used to control the operation mode of the air source heat pump; the weight coefficients of the ambient temperature, solar radiation intensity and the change rate of the water temperature of the heat storage tank are dynamically adjusted according to the seasonal and regional climate characteristics or user preference presets, and the working mode of the air source heat pump can be adjusted according to influencing factors such as the real-time environment and solar radiation conditions, thereby improving the reliability of system control.

[0065] Before the weighted threshold method is used to calculate the comprehensive index W, the technical solution of the present invention also includes: determining the startup strategy of the auxiliary electric heater according to the water temperature of the hot water storage tank, thereby ensuring the reliability of the heat pump system control in cold areas.

[0066] In the technical solution of the present invention, the hot water supply strategy of the photovoltaic thermal integration device is determined according to the outlet water temperature of the photovoltaic thermal integration device, and the heating object that provides hot water source for the heat storage tank is adjusted; the utilization rate of the heat pump system control is improved; the electronic control system determines the power supply strategy of the photovoltaic thermal integration device according to the battery capacity data sent by the photovoltaic battery management system BMS, thereby improving the overall energy comprehensive utilization efficiency of the system.

[0067] Although the above describes the specific embodiments of the present invention in conjunction with the accompanying drawings, it is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art on the basis of the technical solution of the present invention without any creative work are still within the scope of protection of the present invention.

Claims

1. A photovoltaic-thermal integrated device coupled with an air-source heat pump control system, characterized in that: It includes: a photovoltaic-thermal integrated device, an air source heat pump, a water storage tank, a control system, a water circulation system, and a sensor acquisition system. The photovoltaic-thermal integrated device is used to absorb solar radiation and generate low-temperature hot water; the air source heat pump is used to absorb the heat generated by the photovoltaic-thermal integrated device and heat the cold water in the water storage tank through the generated heat; the water circulation system includes a user-side water circulation system and a heat source-side water circulation system; the user-side water circulation system is used to transport the hot water in the water storage tank to the user end, and transport the return cold water from the user end to the water storage tank; the heat source-side water circulation system is used to circulate the cold water in the water storage tank to the air source heat pump or the photovoltaic-thermal integrated device for heating, and return the heated hot water to the water storage tank ; The heat storage tank is used to store cold water and deliver heated hot water to the user end; the sensor acquisition system includes a solar radiation sensor arranged at the water supply end of the water circulation system on the user side, an outlet water temperature sensor arranged at the outlet of the photovoltaic thermal integration device, an ambient temperature sensor arranged indoors and outdoors, a heat storage tank temperature sensor arranged inside the heat storage tank, and a return water temperature sensor arranged at the return water end of the water circulation system on the user side; the control system is used to collect and determine the corresponding control strategy based on the ambient temperature, solar radiation intensity, heat storage tank water temperature, photovoltaic thermal integration device outlet water temperature, and return water temperature at the return water end of the water circulation system on the user side, and control the operation of the air source heat pump based on the air source heat pump start-up strategy in the control strategy.

2. A photovoltaic-thermal integrated device coupled with an air source heat pump control system according to claim 1, characterized in that: The air source heat pump includes an evaporator, a condenser, an expansion valve, and a compressor. The evaporator is used to absorb heat from the low-temperature circulating cold water generated by the photovoltaic and thermal integrated device to generate gaseous refrigerant, and then transport the generated gaseous refrigerant to the condenser through the expansion valve. The condenser is used to liquefy the gaseous refrigerant and use the heat generated by the liquefaction to heat the cold water in the condenser, thereby transporting the hot water to the hot water storage tank, and then transporting the liquefied refrigerant to the evaporator through the compressor; The water circulation system on the heat source side includes a condenser inlet pipe, a condenser outlet pipe, an evaporator inlet pipe, an evaporator outlet pipe, a PVT outlet pipe, a PVT inlet pipe, a first diverter valve, and a second diverter valve; the condenser inlet pipe is used to circulate the cold water in the heat storage tank to the condenser for heating, and the condenser outlet pipe is used to return the heated hot water to the heat storage tank; the evaporator inlet pipe is used to transport the low-temperature circulating cold water generated by the photovoltaic thermal integration device to the evaporator, and the evaporator outlet pipe is used to transport the low-temperature circulating cold water in the evaporator to the photovoltaic thermal integration device; the PVT outlet pipe is used to transport the low-temperature hot water generated by the photovoltaic thermal integration device to the evaporator In the water inlet pipe, or, the high-temperature circulating hot water generated by the photovoltaic thermal integration device is transported to the heat storage tank; the PVT water inlet pipe is used to transport the cold water in the evaporator outlet pipe or the cold water in the heat storage tank to the photovoltaic thermal integration device; the first diverter valve is arranged between the PVT water outlet pipe and the evaporator water inlet pipe, and is used to transport the low-temperature circulating cold water generated by the photovoltaic thermal integration device to the evaporator water inlet pipe, or to transport the high-temperature circulating hot water generated by the photovoltaic thermal integration device to the heat storage tank; the second diverter valve is arranged between the PVT water inlet pipe and the evaporator water outlet pipe, and is used to transport the circulating cold water return generated by the heat storage tank and the evaporator to the photovoltaic thermal integration device.

3. The photovoltaic-thermal integrated device coupled with an air source heat pump control system according to claim 1 is characterized in that: include: The power consumption system includes a battery, an inverter, a photovoltaic battery management system BMS, an electronic control system, and a municipal power grid. The battery is used to store the electricity generated in the photovoltaic thermal integration device; the inverter is used to convert the direct current generated in the photovoltaic thermal integration device into alternating current, and transmit the converted alternating current to the municipal power grid and the user system respectively, and convert the alternating current in the municipal power grid into direct current, and charge the battery with the converted direct current; the photovoltaic battery management system BMS is used to manage the charging and discharging process of the battery; the electronic control system is arranged in the user's room, and is communicated with the photovoltaic battery management system BMS and the inverter respectively, and is used to control the working mode of the photovoltaic battery management system BMS and the inverter.

4. A photovoltaic-thermal integrated device coupled with an air source heat pump control system according to any one of claims 1 to 3, characterized in that: The corresponding control strategy is determined based on the collected ambient temperature, solar radiation intensity, water temperature of the heat storage tank, outlet water temperature of the photovoltaic thermal integration device, and return water temperature of the return water end of the user-side water circulation system. The operation of the air source heat pump is controlled based on the air source heat pump startup strategy in the control strategy, specifically including: Based on the collected ambient temperature, solar radiation intensity, and water temperature of the heat storage tank, the weighted threshold method is used to calculate the comprehensive index W. According to the numerical range of the comprehensive index W, the air source heat pump startup strategy is determined. Based on the air source heat pump startup strategy, the hierarchical startup logic is used to control the operation mode of the air source heat pump.

5. The photovoltaic-thermal integrated device coupled with an air source heat pump control system according to claim 4 is characterized in that: According to the collected ambient temperature, solar radiation intensity, and water temperature of the hot water storage tank, the weighted threshold method is used to calculate the comprehensive index W: ， ， ， ， ， in: It is the ambient temperature threshold for starting the air source heat pump alone; The temperature threshold of the hot water storage tank when starting the air source heat pump alone; The solar radiation intensity threshold value received by the photovoltaic-thermal integrated device when the air source heat pump is started alone; The daily system energy consumption threshold when the air source heat pump is started alone; 、 、 、 is the threshold judgment function; 、 、 are the weight coefficients of ambient temperature, solar radiation intensity and water temperature change rate of the hot water storage tank respectively; To collect ambient temperature in real time; is the solar radiation intensity; The water temperature of the hot water storage tank; is the system energy consumption for the day; Among them, the weight coefficients of ambient temperature, solar radiation intensity and water temperature change rate of the hot water storage tank are dynamically adjusted according to the season, regional climate characteristics or user preference presets as follows: ， ， in: is the average outdoor ambient temperature in the i-th season; is the average solar radiation intensity in the i-th season; Weight coefficient of water temperature change rate of hot water storage tank Adjustments are made based on daily personnel feedback and operational data, with each adjustment increasing or decreasing with a preset adjustment step of 0.

05.

6. The photovoltaic-thermal integrated device coupled with an air source heat pump control system according to claim 4, characterized in that: According to the numerical range of the comprehensive index W, the air source heat pump startup strategy is determined. Based on the air source heat pump startup strategy, the hierarchical startup logic is used to control the operation mode of the air source heat pump as follows: when When the air source heat pump is started and the high power operation mode of the air source heat pump is turned on, the water temperature of the hot water storage tank is quickly increased to ensure the timely supply of hot water; when When the air source heat pump is turned on, the air source heat pump is started and the low power operation mode of the air source heat pump is turned on.

7. The photovoltaic-thermal integrated device coupled with an air source heat pump control system according to claim 4, characterized in that: The photovoltaic-thermal integrated device coupled with the air-source heat pump control system further includes an auxiliary electric heater disposed inside the hot water storage tank for heating the cold water inside the hot water storage tank; the control strategy further includes a startup strategy for the auxiliary electric heater; and before calculating the comprehensive index W using the weighted threshold method, the control strategy further includes: determining the startup strategy for the auxiliary electric heater based on the water temperature of the hot water storage tank, specifically: When the set supply temperature of the hot water storage tank is higher than the water temperature of the hot water storage tank, and the difference between the set supply temperature of the hot water storage tank and the water temperature of the hot water storage tank is higher than the minimum temperature difference set for the electric auxiliary heating, the air source heat pump is started separately; When the set supply temperature of the hot water storage tank is higher than the water temperature of the hot water storage tank, and the difference between the set supply temperature of the hot water storage tank and the water temperature of the hot water storage tank is not greater than the minimum temperature difference set for the electric auxiliary heating, and the system energy consumption on that day is not greater than the system energy consumption threshold on that day, the air source heat pump and the auxiliary electric heater are started respectively, and the operation mode of the air source heat pump is the low power operation mode; When the set supply temperature of the hot water storage tank is not greater than the water temperature of the hot water storage tank, the air source heat pump is controlled to stop heating, or the air source heat pump and the auxiliary electric heater both stop heating.

8. The photovoltaic-thermal integrated device coupled with an air source heat pump control system according to claim 8, characterized in that: The control strategy also includes a hot water supply strategy for the photovoltaic-thermal integrated device; before determining the startup strategy of the auxiliary electric heater according to the water temperature of the hot water storage tank, it also includes: determining the hot water supply strategy for the photovoltaic-thermal integrated device according to the outlet water temperature of the photovoltaic-thermal integrated device, specifically: When the outlet water temperature of the photovoltaic-thermal integrated device is lower than the return water temperature of the water circulation system on the user side, the low-temperature circulating cold water produced by the photovoltaic-thermal integrated device is introduced into the evaporator of the air source heat pump, and the cooling energy released by the evaporator of the air source heat pump is absorbed through the heat exchange process; When the outlet water temperature of the photovoltaic-thermal integrated device is not lower than the return water temperature of the return water end of the user-side water circulation system, the high-temperature circulating hot water produced by the photovoltaic-thermal integrated device is introduced into the hot water storage tank to provide heat for the hot water storage tank.

9. The photovoltaic-thermal integrated device coupled with an air source heat pump control system according to claim 3 is characterized in that the electronic control The system determines the power supply strategy for the photovoltaic and solar-thermal integrated device based on the battery capacity data sent by the photovoltaic battery management system (BMS). Specifically: The electric control system obtains the user's current input of the user's system power demand , real-time electricity charges 、Peak and valley electricity charges of the day , obtain the instantaneous photovoltaic power generation through the photovoltaic battery management system BMS , battery capacity SOC; When the instantaneous photovoltaic power generation Greater than the user system power demand When the SOC of the battery capacity is greater than the first preset threshold, the surplus electricity generated by the photovoltaic and thermal integrated device will be sold to the municipal power grid; when the SOC of the battery capacity is not greater than the first preset threshold, if the real-time electricity fee is Peak and valley electricity charges of the day If the power is equal, the battery is charged using the municipal power grid; When the instantaneous photovoltaic power generation Not greater than the user's system power demand When the battery capacity is less than a first preset threshold and greater than a second preset threshold, the battery is judged to supply power to the user system if the battery capacity is less than the first preset threshold and greater than the second preset threshold; If the battery capacity is not less than the first preset threshold, or not greater than the second preset threshold, determine whether the battery capacity is not greater than the second preset threshold. If the battery capacity is not greater than the second preset threshold, use the municipal power grid to charge the battery; if the battery capacity is greater than the second preset threshold, the battery supplies power to the user system.

10. A photovoltaic-thermal integrated device coupled with an air source heat pump control method, characterized in that: The photovoltaic-thermal integrated device according to any one of claims 1 to 9 is coupled with an air source heat pump control system, comprising: The sensor acquisition system collects real-time data on ambient temperature, solar radiation intensity, water temperature in the heat storage tank, outlet water temperature of the photovoltaic and thermal integrated device, and return water temperature at the return end of the user-side water circulation system; The control system determines the corresponding control strategy based on the collected ambient temperature, solar radiation intensity, water temperature of the heat storage tank, outlet water temperature of the photovoltaic thermal integration device, and return water temperature of the return water end of the user-side water circulation system, and controls the operation of the air source heat pump based on the air source heat pump start-up strategy in the control strategy.

Images