Multi-mode combined cooling heating and power supply system adaptive to all-weather scene and control method of multi-mode combined cooling heating and power supply system

Abstract

The invention discloses a multi-mode combined cooling, heating and power supply system adaptive to all-weather scenes and a control method thereof, and belongs to the field of energy supply, the multi-mode combined cooling, heating and power supply system comprises a PVT power generation module, a heat pump coupling module and a cold and heat supply module, the PVT power generation module works in a PVT assembly independent power supply and heat storage mode, a PVT and commercial power grid combined power supply and heat storage mode or a PVT cooling power supply mode, and the heat pump coupling module is connected with the PVT power generation module. The heat pump coupling module works in a heat pump independent heat supply mode, an ethylene glycol independent heat supply mode or a combined cooling and heat supply mode, and the cold and heat supply module works in an independent hot water supply mode, a hot water supply combined cooling mode or a hot water supply combined heat supply mode. By adopting the multi-mode combined cooling heating and power system adaptive to the all-climate scene and the control method thereof, the working modes can be switched according to the climate scene, so that the system is adaptive to the all-climate scene, and the application range is widened.

Description

Technical Field

[0001] This invention relates to the field of energy supply technology, and in particular to a multi-mode combined cooling, heating and power system and its control method that is adaptable to all climate scenarios. Background Technology

[0002] With the increasing penetration of renewable energy, combined cooling, heating, and power (CCHP) systems have become a core technology direction for building and industrial park energy systems due to their ability to provide coordinated supply of electricity, heat, and cooling. Currently, the mainstream technological approaches fall into two categories: one is thermomechanical energy storage coupled with CCHP, such as compressed air energy storage (CAES), liquid air energy storage (LAES), and heat pump energy storage (PTES), which are combined with CCHP to improve supply flexibility through energy form conversion, achieving a total energy efficiency (TEE) of 65%-188%; the other is photovoltaic-photothermal (PVT) coupled with heat pump systems, which integrates PVT modules with heat pump systems to simultaneously achieve power generation and cooling / heating supply, improving energy utilization by more than 40% compared to traditional photovoltaic systems. Although CCHP technology has been studied on a large scale, existing solutions still have bottlenecks that are difficult to overcome, and cannot meet the actual needs of all-climate, high-efficiency, and stable operation. Specifically, these bottlenecks are: (i) Limited climate adaptability and instability under extreme conditions: High-temperature scenario contradictions: In summer, the temperature of PVT components in direct expansion PVT heat pump systems rises, leading to a decrease in photoelectric conversion efficiency. At the same time, condensation heat cannot be recovered, which wastes energy and exacerbates system pressure, and may even lead to the risk of pipe bursting; Low-temperature scenario failure: The circulating working fluid of traditional systems (such as ordinary water-based fluids) is prone to freezing. The energy efficiency ratio (COP) of the heat pump drops by more than 50% below -5℃, requiring high-energy-consuming auxiliary heating; Supply and demand imbalance in extreme weather: Extreme high temperatures / warm winters caused by climate change increase the fluctuation range of cold and heat loads. Traditional fixed-mode systems often experience the problem of "insufficient cooling in summer and excessive heating in winter". (ii) Rigid mode switching and serious energy waste: Insufficient synergy between PVT and heat pump: Most existing systems adopt a single operating mode (such as PVT only generating electricity and heat pump only providing heat), and high-energy-consuming components such as compressors are still started when the load is low, resulting in a decrease in energy efficiency ratio; Incomplete waste heat recovery: Of the 80% of solar radiation waste heat generated by PVT components, only 30% can be utilized, and condensation heat is even directly discharged under cooling conditions, resulting in significant energy waste; Conflicts in multi-energy supply: Most systems cannot simultaneously provide cooling, heating and hot water supply, and a certain function must be sacrificed to meet the demand (such as not being able to produce domestic hot water when cooling). (III) Defects in power supply stability and system integration: Single energy supply: Relying on photovoltaic or grid power as the only path, the system must rely entirely on grid power in low light scenarios such as cloudy days and nights, resulting in poor power supply reliability; Poor component compatibility: The blown plate heat absorbers used in PVT modules have problems such as limited area and low pressure resistance, making them difficult to adapt to medium and large-scale systems; Coarse control strategy: Lacking dynamic control logic based on temperature, load, and energy storage status, the system response lags behind changes in demand, resulting in reduced overall energy efficiency. Summary of the Invention

[0003] The purpose of this invention is to provide a multi-mode combined cooling, heating and power system and its control method that are adaptable to all climate scenarios, thereby solving the above-mentioned technical problems.

[0004] To achieve the above objectives, the present invention provides a multi-mode combined cooling, heating and power (CCHP) system adaptable to all climate scenarios, including a PVT power generation module, a heat pump coupling module, and a cooling and heating supply module. The PVT power generation module operates in a PVT module-only power supply and heat storage mode, a PVT and grid-connected power supply and heat storage mode, or a PVT cooling power supply mode. The heat pump coupling module operates in a heat pump-only heating mode, an ethylene glycol-only heating mode, or a combined cooling and heating mode. The cooling and heating supply module operates in a separate hot water supply mode, a hot water supply combined with cooling mode, or a hot water supply combined with heating mode.

[0005] Preferably, the PVT power generation module includes a PVT module and a cooling module and a heat storage and heat exchange module respectively connected to the PVT module. A temperature sensor is provided on the front side of the photovoltaic array of the PVT module. The temperature sensor is electrically connected to the cooling module and the heat storage and heat exchange module respectively via a temperature controller. The circulating working fluid of the cooling module and the heat storage and heat exchange module is ethylene glycol, so as to realize the operation of the cooling module and the heat storage and heat exchange module by switching the temperature through the feedback temperature of the temperature sensor.

[0006] Preferably, the heat storage and heat exchange assembly includes an ethylene glycol heat storage and heat exchange tank, and the cooling assembly includes an air-cooled radiator. The inlet and outlet of the ethylene glycol circulation pipe are connected to the right working fluid inlet and right working fluid outlet of the ethylene glycol heat storage and hot water exchange tank after being merged through corresponding junction pipes. An ethylene glycol circulation pump is installed on the junction pipe connected to the right working fluid inlet of the ethylene glycol heat storage and hot water exchange tank. A first solenoid valve is installed on the junction pipe between the ethylene glycol circulation pump and the ethylene glycol heat storage and hot water exchange tank. A second solenoid valve is installed on the junction pipe connected to the right working fluid outlet of the ethylene glycol heat storage and hot water exchange tank. The first solenoid valve and the ethylene glycol circulation pump are connected to the inlet of the air-cooled radiator through a pipeline. The outlet of the air-cooled radiator is connected to the junction pipe between the second solenoid valve and the inlet of the ethylene glycol circulation pipe. A third solenoid valve and a fourth solenoid valve are installed on the outlet and inlet of the air-cooled radiator, respectively. The ethylene glycol heat storage and heat exchange tank is connected to the heat pump coupling module.

[0007] Preferably, the heat pump coupling module includes an ethylene glycol heat release component and a heat pump coupling component. The ethylene glycol heat release component includes a three-channel plate heat exchanger, a first plate heat exchanger, and a second plate heat exchanger. The ethylene glycol inlet of the three-channel plate heat exchanger is connected to the left working fluid outlet of the ethylene glycol heat storage water tank via a fifth solenoid valve and a heat exchange circulation pump. The ethylene glycol outlet of the three-channel plate heat exchanger is connected to the left working fluid inlet of the ethylene glycol heat storage water tank via a sixth solenoid valve. The fifth solenoid valve and the heat exchange circulation pump are connected to the ethylene glycol inlet of the first plate heat exchanger via a seventh solenoid valve. The ethylene glycol outlet of the first plate heat exchanger is connected to the sixth solenoid valve and the ethylene glycol heat storage water tank via an eighth solenoid valve. The heat pump coupling assembly includes a compressor, a gas separator, and a ninth solenoid valve arranged sequentially between the cold water inlet end of the second plate heat exchanger and the cold water outlet end of the three-channel plate heat exchanger, as well as a liquid receiver and a tenth solenoid valve arranged sequentially between the cold water outlet end of the second plate heat exchanger and the cold water inlet end of the three-channel plate heat exchanger. Both the first and second plate heat exchangers are connected to the hot water storage tank of the hot and cold supply module.

[0008] Preferably, the ethylene glycol exothermic assembly further includes a direct evaporator, the inlet of which is connected between the tenth solenoid valve and the three-channel plate heat exchanger via the eleventh solenoid valve, and a twelfth solenoid valve is also provided between the eleventh and tenth solenoid valves, and the outlet of the direct evaporator is connected between the gas separator and the ninth solenoid valve via the thirteenth solenoid valve.

[0009] Preferably, the hot and cold water supply module includes a hot water storage tank, a cold water storage tank, and energy-consuming equipment. The hot water inlet of the hot water storage tank is connected to the hot water outlet of the second plate heat exchanger. The hot water outlet of the hot water storage tank is connected to the hot water inlet of the first plate heat exchanger via a hot water circulation pump. The hot water outlet of the first plate heat exchanger is connected to the hot water inlet of the second plate heat exchanger. The cold water inlet of the cold water storage tank is connected to the cold water outlet of the three-channel plate heat exchanger via a cold water circulation pump, and the cold water outlet of the cold water storage tank is connected to the cold water inlet of the three-channel plate heat exchanger. The heating end of the hot water storage tank and the cooling end of the cold water storage tank are both connected to the energy-consuming equipment.

[0010] Preferably, the energy-consuming equipment includes hot water supply equipment and HVAC cooling and heating equipment, wherein the hot water supply equipment is connected to the heating outlet of the hot water storage tank in sequence via a hot water supply circulation pump and a fourteenth solenoid valve; The inlet of the HVAC cooling and heating equipment is connected to the fifteenth and sixteenth solenoid valves via a hot and cold air supply circulation pump. The fifteenth solenoid valve is connected between the fourteenth solenoid valve and the hot water storage tank. The sixteenth solenoid valve is connected to the cooling outlet of the cold water storage tank. The outlet of the HVAC cooling and heating equipment is connected to the seventeenth and eighteenth solenoid valves. The seventeenth solenoid valve is connected to the cooling inlet of the cold water storage tank. The eighteenth solenoid valve is connected to the heating inlet of the hot water storage tank.

[0011] Preferably, the PVT power generation module also includes a battery, an inverter control unit, and a mains power grid. The photovoltaic array is electrically connected to the input end of the battery, and the input end of the battery is also electrically connected to the mains power grid via the inverter control unit. The output end of the battery is electrically connected to the heat pump coupling module and the heating and cooling supply module, respectively.

[0012] A control method for a multi-mode combined cooling, heating and power (CCHP) system adaptable to all climate scenarios, including a PVT power generation module control method, a heat pump coupling module control method, and a cooling and heating supply module control method. Among them, the PVT power generation module control method includes a PVT module independent power supply and heat storage mode, a PVT and grid combined power supply and heat storage mode, and a PVT cooling power supply mode. The heat pump coupling module control methods include heat pump standalone heating mode, ethylene glycol standalone heating mode, and combined cooling and heating mode; The control methods for the heating and cooling supply modules include a separate hot water supply mode, a hot water supply combined with cooling mode, or a hot water supply combined with heating mode.

[0013] Preferably, the control method for the PVT module's independent power supply heat storage mode is as follows: During the day, when the temperature sensor detects that the temperature on the front of the photovoltaic array is less than a set threshold, and at the same time, the battery charge is greater than a set threshold, the ethylene glycol circulation pump, the first solenoid valve, and the second solenoid valve are opened, while the third solenoid valve, the fourth solenoid valve, and the inverter control unit are closed. At this time, the photovoltaic array converts light energy into electrical energy and delivers it to the battery for storage, using the battery to power the heat pump coupling module and the heating and cooling supply module. During this process, the ethylene glycol working fluid in the ethylene glycol circulation pipe absorbs the waste heat generated by the photovoltaic array and the daytime heat, and then flows through the collection pipe. Driven by the ethylene glycol circulation pump, it enters the ethylene glycol heat storage and heat exchange water tank through the first solenoid valve and the right working fluid inlet to store heat. After heat exchange, the cooled ethylene glycol working fluid flows back to the ethylene glycol circulation pipe through the right working fluid outlet of the ethylene glycol heat storage and heat exchange water tank, the second solenoid valve, and the collection pipe, completing the heat storage-circulation process. The control method for the PVT and grid-connected thermal storage mode is as follows: During the daytime, when the temperature sensor detects that the front temperature of the photovoltaic array is lower than the set threshold and the battery charge is not greater than the set threshold, based on the PVT module-only thermal storage mode, the inverter control unit is turned on, so that the grid is connected to the battery input terminal synchronously with the photovoltaic array through the inverter control unit, and the battery is used to supply power to the heat pump coupling module and the cooling and heating supply module; during this process, the same heat exchange measures as the PVT module-only thermal storage mode are used to cool the photovoltaic array. The control method of PVT cooling power supply mode is as follows: During the daytime and when the temperature on the front of the photovoltaic array is not lower than the set threshold, the first solenoid valve and the second solenoid valve are closed; the ethylene glycol circulation pump, the third solenoid valve, the fourth solenoid valve, and the air-cooled heat sink are turned on. At this time, the ethylene glycol working fluid in the ethylene glycol circulation pipe is combined through the collection pipe and driven by the ethylene glycol circulation pump, enters the air-cooled heat sink through the fourth solenoid valve, and is cooled by the air-cooled heat sink; the cooled ethylene glycol working fluid flows back to the ethylene glycol circulation pipe through the outlet of the air-cooled heat sink, the third solenoid valve, and the collection pipe to cool the photovoltaic array until the temperature on the front of the photovoltaic array is lower than the set threshold, then switch back to PVT standalone power supply heat storage mode or PVT and grid combined power supply heat storage mode. The control method for the heat pump's standalone heating mode is as follows: When the heating and cooling supply module only needs heating, the heat exchange circulation pump, the fifth and sixth solenoid valves, the compressor, the gas separator, the ninth solenoid valve, the receiver, the tenth and twelfth solenoid valves, and the hot water circulation pump are turned on; the seventh, eighth, eleventh, and thirteenth solenoid valves, and the cold water circulation pump are turned off. At this time, the high-temperature ethylene glycol working fluid in the ethylene glycol heat storage water exchange tank enters the ethylene glycol channel of the three-channel plate heat exchanger through the left working fluid outlet, the heat exchange circulation pump, and the fifth solenoid valve, exchanging heat with the refrigerant in the cold water channel of the three-channel plate heat exchanger, causing the refrigerant to heat up and vaporize; the vaporized refrigerant enters the compressor through the ninth solenoid valve and the gas separator. The compressor compresses the refrigerant into a high-temperature, high-pressure medium, which then enters the cold water channel of the second plate heat exchanger. Simultaneously, the hot water circulation pump draws low-temperature hot water from the hot water storage tank, which then enters the hot water channel of the second plate heat exchanger through the hot water outlet of the first plate heat exchanger. After absorbing heat from the high-temperature, high-pressure refrigerant, the hot water enters the hot water storage tank through the hot water outlet of the second plate heat exchanger. The refrigerant, cooled after heat exchange, flows back to the three-channel plate heat exchanger through the cold water outlet of the second plate heat exchanger, the liquid storage tank, and the tenth solenoid valve. The ethylene glycol working fluid, cooled after heat exchange, flows back to the ethylene glycol hot water storage tank through the ethylene glycol outlet of the three-channel plate heat exchanger, the sixth solenoid valve, and the working fluid inlet on the left side of the ethylene glycol hot water storage tank, completing the heat pump heating-circulation process. The control method for the ethylene glycol standalone heating mode is as follows: When the heating load of the cold and hot supply module is lower than the set threshold, the compressor, gas separator, ninth solenoid valve, liquid receiver, tenth solenoid valve, fifth solenoid valve, sixth solenoid valve, and cold water circulation pump are shut down; the heat exchange circulation pump, seventh solenoid valve, eighth solenoid valve, and hot water circulation pump are turned on; at this time, the high-temperature ethylene glycol working fluid in the ethylene glycol heat storage and hot water exchange tank enters the ethylene glycol flow channel of the first plate heat exchanger through the left working fluid outlet, heat exchange circulation pump, and seventh solenoid valve, and interacts with the first plate heat exchanger. The circulating hot water in the hot water flow channel of the plate heat exchanger exchanges heat; the hot water circulation pump draws low-temperature hot water from the hot water storage tank, enters through the hot water inlet of the first plate heat exchanger, absorbs heat from ethylene glycol, and then enters the hot water storage tank through the hot water outlet of the first plate heat exchanger, the hot water inlet of the second plate heat exchanger, the hot water outlet of the second plate heat exchanger, and the hot water inlet of the hot water storage tank; the ethylene glycol working medium, cooled down after heat exchange, flows back to the ethylene glycol heat storage hot water tank through the ethylene glycol outlet of the first plate heat exchanger and the eighth solenoid valve, completing the direct heating-circulation of ethylene glycol; The control method for the combined cooling and heating mode is as follows: When the cooling and heating supply modules need to supply both cooling and heating simultaneously, the ethylene glycol circulation pump is shut down on the basis of the heat pump-only heating mode. At this time, the heating side maintains the heat pump-only heating mode process. Simultaneously, the cold water circulation pump draws ambient temperature water from the cold water storage tank, which enters the cold water channel through the cold water inlet of the three-channel plate heat exchanger. After exchanging heat with the refrigerant and cooling down, the water enters the cold water storage tank through the cold water outlet of the three-channel plate heat exchanger and the cold water inlet of the cold water storage tank. During this process, if the temperature of the refrigerant in the three-channel plate heat exchanger is lower than the set threshold, the eleventh and thirteenth solenoid valves and the direct evaporator are opened, and the twelfth solenoid valve is closed. The refrigerant enters the direct evaporator through the tenth and eleventh solenoid valves, absorbs ambient heat, and then enters the compressor through the thirteenth solenoid valve and the gas separator to replenish the heat pump circulation heat. Otherwise, the eleventh and thirteenth solenoid valves are closed, and the twelfth solenoid valve is opened. The refrigerant enters the three-channel plate heat exchanger through the twelfth solenoid valve for heat replenishment. The control method for the standalone hot water supply mode is as follows: When the hot water supply equipment sends a demand signal, and the HVAC cooling and heating equipment does not send a cooling or heating demand signal, the hot water supply circulation pump and the fourteenth solenoid valve are turned on; the hot and cold air supply circulation pump, the fifteenth solenoid valve, the sixteenth solenoid valve, the seventeenth solenoid valve, and the eighteenth solenoid valve are turned off; at this time, the high-temperature hot water in the hot water storage tank is transported to the hot water supply equipment through the heating outlet, the fourteenth solenoid valve, and the hot water supply circulation pump to meet the hot water demand; The control method for the combined hot water supply and cooling mode is as follows: The hot water supply equipment sends a demand signal, and the HVAC cooling and heating equipment sends a cooling demand signal. Based on the independent hot water supply mode, the sixteenth and seventeenth solenoid valves of the hot and cold air supply circulation pump are opened; the fifteenth and eighteenth solenoid valves are closed. At this time, the hot water supply equipment continuously receives hot water from the hot water storage tank via the fourteenth solenoid valve and the hot water supply circulation pump. The hot and cold air supply circulation pump draws low-temperature cold water from the cold water storage tank and enters the HVAC cooling and heating equipment through the cooling outlet, the sixteenth solenoid valve, and the hot and cold air supply circulation pump. After the HVAC cooling and heating equipment releases cooling capacity into the room, the heated cold water flows back to the cold water storage tank through the seventeenth solenoid valve and the cooling inlet of the cold water storage tank, completing the cooling-circulation process. The control method for the combined hot water supply and heating mode is as follows: The hot water supply equipment sends a demand signal, and the HVAC cooling and heating equipment sends a heating demand signal; based on the independent hot water supply mode, the hot and cold air supply circulation pump, the fifteenth solenoid valve, and the eighteenth solenoid valve are opened; the sixteenth solenoid valve and the seventeenth solenoid valve are closed; at this time, the hot water supply equipment continuously receives hot water; the hot and cold air supply circulation pump draws high-temperature hot water from the hot water storage tank, and enters the HVAC cooling and heating equipment through the heating outlet, the fifteenth solenoid valve, and the hot and cold air supply circulation pump; after the HVAC cooling and heating equipment releases heat into the room, the cooled hot water flows back to the hot water storage tank through the eighteenth solenoid valve and the heating inlet of the hot water storage tank, completing the heating-circulation.

[0014] Therefore, the beneficial effects of the multi-mode combined cooling, heating, and power system and its control method adapted to all climate scenarios adopted in this invention are as follows: 1. Strong adaptability to all climate scenarios, significantly expanding the scope of application: Through multi-mode switching, it can accurately match different climate conditions (high temperature, low temperature, normal temperature difference): The PVT power generation module can switch between "independent power supply and heat storage", "joint power supply and heat storage with the municipal grid", and "cooling power supply" modes according to the light intensity and photovoltaic array temperature; the heat pump coupling module can switch between "heat pump independent heating", "ethylene glycol independent heating", and "joint cooling and heating" modes according to the heating load and cooling and heating demand; the cooling and heating supply module can switch between "independent hot water supply", "hot water combined cooling", and "hot water combined heating" modes according to the user's energy demand, avoiding the problem that a single mode cannot adapt to extreme climates (such as high temperature photovoltaic overheating, low temperature working fluid freezing), and achieving full climate scenario coverage; 2. High energy efficiency, achieving cascaded recovery and energy-saving operation: The PVT power generation module absorbs waste heat from photovoltaic array power generation and daytime heat through ethylene glycol circulation pipes, storing it in an ethylene glycol heat storage and hot water exchange tank, converting "waste heat from power generation" into "heat source" and reducing energy waste; at the same time, when the heating load is low, the heat pump coupling module switches to "ethylene glycol-only heating mode" (shutting down high-energy-consuming components such as compressors), providing heat directly through heat exchange between ethylene glycol and circulating hot water, reducing energy consumption; when simultaneous cooling and heating are required, the heating side maintains the heat pump process, while the cooling side uses a three-channel plate heat exchanger to exchange heat with refrigerant for cooling, eliminating the need for an independent cooling system, achieving synergistic energy utilization, and improving overall energy efficiency; 3. Stable and reliable power supply system, avoiding the impact of photovoltaic power supply fluctuations: The PVT power generation module is equipped with a dual guarantee of "battery + grid connection". When the battery has sufficient power, the photovoltaic system can supply heat storage alone; when the battery has insufficient power (such as on cloudy days with weak sunlight), the photovoltaic system is connected to the grid through the inverter control unit to achieve synchronous power supply between the photovoltaic system and the grid. This ensures that the power demand of the heat pump coupling module and the heating and cooling supply module is not interrupted, solving the pain points of traditional photovoltaic systems such as "unstable power supply and dependence on weather". 4. The cooling components and heat storage and heat exchange components use ethylene glycol as the circulating working fluid. Ethylene glycol has low-temperature antifreeze properties and can circulate normally in cold climates, avoiding pipe blockage or system failure caused by the freezing of the working fluid.

[0015] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0016] Figure 1 This is a pipeline connection diagram for the multi-mode combined cooling, heating and power system adapted to all climate scenarios of the present invention.

[0017] Figure Labels 1. Municipal power grid; 2. Inverter control unit; 3. Storage battery; 4. Photovoltaic array; 5. Ethylene glycol circulation pipe; 6. Main pipe; 7. Third solenoid valve; 8. Second solenoid valve; 9. Ethylene glycol heat storage and hot water exchange tank; 10. First solenoid valve; 11. Ethylene glycol circulation pump; 12. Fourth solenoid valve; 13. Air-cooled radiator; 14. Heat exchange circulation pump; 15. Fifth solenoid valve; 16. Seventh solenoid valve; 17. Three-channel plate heat exchanger; 18. Twelfth solenoid valve; 19. Liquid receiver; 20. Second plate heat exchanger; 21. First plate heat exchanger; 22. Hot water circulation pump; 23. 24. Sixth solenoid valve; 25. Eighth solenoid valve; 26. Direct evaporator; 27. Ninth solenoid valve; 28. Thirteenth solenoid valve; 29. ​​Cold water circulation pump; 20. Eleventh solenoid valve; 31. Tenth solenoid valve; 32. Gas separator; 33. Compressor; 34. Hot water storage tank; 35. Hot water supply circulation pump; 36. Hot water supply equipment; 37. Fourteenth solenoid valve; 38. Cold and hot gas supply circulation pump; 39. HVAC cooling and heating equipment; 40. Eighteenth solenoid valve; 41. Seventeenth solenoid valve; 42. Fifteenth solenoid valve; 43. Sixteenth solenoid valve; 44. Cold water storage tank. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the embodiments of the present invention and are not intended to limit the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of this application. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout.

[0019] It should be noted that the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion, such as a process, method, system, product, or server that includes a series of steps or units, not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such process, method, product, or device.

[0020] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0021] like Figure 1As shown, the multi-mode combined cooling, heating, and power (CCHP) system adaptable to all climate scenarios includes a PVT power generation module, a heat pump coupling module, and a cooling and heating supply module. The PVT power generation module operates in a PVT module-only power supply and heat storage mode, a PVT and grid-connected power supply and heat storage mode, or a PVT cooling power supply mode. The heat pump coupling module operates in a heat pump-only heating mode, a glycol-only heating mode, or a combined cooling and heating mode. The cooling and heating supply module operates in a hot water supply mode, a hot water supply combined with cooling mode, or a hot water supply combined with heating mode.

[0022] The PVT power generation module includes a PVT module and a cooling module and a heat storage and heat exchange module connected to the PVT module. An ethylene glycol circulation pipe 5 is provided on the back of the photovoltaic array 4 of the PVT module, and a temperature sensor is provided on the front of the photovoltaic array 4 of the PVT module. The temperature sensor is electrically connected to the cooling module and the heat storage and heat exchange module via a temperature controller. The circulating working fluid of the cooling module and the heat storage and heat exchange module is ethylene glycol, so that the operation of the cooling module and the heat storage and heat exchange module is switched according to the temperature feedback of the temperature sensor.

[0023] The heat storage and heat exchange assembly includes an ethylene glycol heat storage and heat exchange tank 9, and the cooling assembly includes an air-cooled radiator 13. The inlet and outlet of the ethylene glycol circulation pipe 5 are respectively connected to the right working fluid inlet and right working fluid outlet of the ethylene glycol heat storage and heat exchange tank 9 via corresponding connecting pipes 6. An ethylene glycol circulation pump 11 is installed on the connecting pipe 6 connected to the right working fluid inlet of the ethylene glycol heat storage and heat exchange tank 9. A first solenoid valve 10 is installed on the connecting pipe 6 between the ethylene glycol circulation pump 11 and the ethylene glycol heat storage and heat exchange tank 9. A second solenoid valve 8 is installed on the main pipe 6 connected to the working fluid outlet on the right side of the ethylene glycol heat storage and heat exchange tank 9. The first solenoid valve 10 is connected to the inlet of the air-cooled radiator 13 via a pipeline between the first solenoid valve 10 and the ethylene glycol circulation pump 11. The outlet of the air-cooled radiator 13 is connected to the main pipe 6 between the second solenoid valve 8 and the inlet of the ethylene glycol circulation pipe 5. A third solenoid valve 7 and a fourth solenoid valve 12 are respectively installed on the outlet and inlet of the air-cooled radiator 13. The ethylene glycol heat storage and heat exchange tank 9 is connected to the heat pump coupling module.

[0024] The heat pump coupling module includes an ethylene glycol heat release component and a heat pump coupling component. The ethylene glycol heat release component includes a three-channel plate heat exchanger 17, a first plate heat exchanger 21, and a second plate heat exchanger 20. The ethylene glycol inlet of the three-channel plate heat exchanger 17 is connected to the left working fluid outlet of the ethylene glycol heat storage water tank 9 via a fifth solenoid valve 15 and a heat exchange circulation pump 14. The ethylene glycol outlet of the three-channel plate heat exchanger 17 is connected to the left working fluid inlet of the ethylene glycol heat storage water tank 9 via a sixth solenoid valve 23. The fifth solenoid valve 15 and the heat exchange circulation pump 14 are connected to the ethylene glycol inlet of the first plate heat exchanger 21 via a seventh solenoid valve 16. The first plate heat exchanger 21 is connected to the ethylene glycol outlet via the eighth solenoid valve 24 between the sixth solenoid valve 23 and the ethylene glycol heat storage water tank 9. The heat pump coupling assembly includes a compressor 32, a gas separator 31, and a ninth solenoid valve 26, which are sequentially arranged between the cold water inlet of the second plate heat exchanger 20 and the cold water outlet of the three-channel plate heat exchanger 17, and a liquid receiver 19 and a tenth solenoid valve 30, which are sequentially arranged between the cold water outlet of the second plate heat exchanger 20 and the cold water inlet of the three-channel plate heat exchanger 17. Both the first plate heat exchanger 21 and the second plate heat exchanger 20 are connected to the heat storage water tank of the hot and cold supply module.

[0025] The ethylene glycol exothermic assembly also includes a direct evaporator 25. The inlet of the direct evaporator 25 is connected between the tenth solenoid valve 30 and the three-channel plate heat exchanger 17 via the eleventh solenoid valve 29. A twelfth solenoid valve 18 is also provided between the eleventh solenoid valve 29 and the tenth solenoid valve 30. The outlet of the direct evaporator 25 is connected between the gas separator 31 and the ninth solenoid valve 26 via the thirteenth solenoid valve 27.

[0026] The heating and cooling supply module includes a hot water storage tank 33, a cold water storage tank 43, and energy-consuming equipment. The hot water inlet of the hot water storage tank 33 is connected to the hot water outlet of the second plate heat exchanger 20. The hot water outlet of the hot water storage tank 33 is connected to the hot water inlet of the first plate heat exchanger 21 via a hot water circulation pump 22. The hot water outlet of the first plate heat exchanger 21 is connected to the hot water inlet of the second plate heat exchanger 20. The cold water inlet of the cold water storage tank 43 is connected to the cold water outlet of the three-channel plate heat exchanger 17 via a cold water circulation pump 28. The cold water outlet of the cold water storage tank 43 is connected to the cold water inlet of the three-channel plate heat exchanger 17. The heating end of the hot water storage tank 33 and the cooling end of the cold water storage tank 43 are both connected to the energy-consuming equipment.

[0027] The energy-consuming equipment includes a hot water supply device 35 and a heating, ventilation, air conditioning (HVAC) cooling and heating device 38. The hot water supply device 35 is connected to the heating outlet of the hot water storage tank 33 via a hot water supply circulation pump 34 and a fourteenth solenoid valve 36. The inlet of the HVAC cooling and heating device 38 is connected to the fifteenth solenoid valve 41 and the sixteenth solenoid valve 42 via a hot and cold air supply circulation pump 37. The fifteenth solenoid valve 41 is connected between the fourteenth solenoid valve 36 and the hot water storage tank 33. The sixteenth solenoid valve 42 is connected to the cooling outlet of the cold water storage tank 43. The outlet of the HVAC cooling and heating device 38 is connected to the seventeenth solenoid valve 40 and the eighteenth solenoid valve 39. The seventeenth solenoid valve 40 is connected to the cooling inlet of the cold water storage tank 43. The eighteenth solenoid valve 39 is connected to the heating inlet of the hot water storage tank 33.

[0028] The PVT power generation module also includes a battery 3, an inverter control unit 2, and a mains grid 1. The photovoltaic array 4 is electrically connected to the input terminal of the battery 3. The input terminal of the battery 3 is also electrically connected to the mains grid 1 via the inverter control unit 2. The output terminal of the battery 3 is electrically connected to the heat pump coupling module and the cooling and heating supply module, respectively.

[0029] Hot water supply equipment 35 is a bathing equipment, and HVAC cooling and heating equipment 38 is a fan coil unit or a combined air conditioning unit. It should be noted that the above-mentioned forms of HVAC cooling and heating equipment are only examples and should not be construed as limitations by those skilled in the art.

[0030] It should be noted that the above electronic components are all mature products on the market. This embodiment only requires purchasing them and connecting them according to the instruction manual. No modifications have been made to them. Therefore, their circuit connection structure and principle will not be described in detail here.

[0031] The control method for a multi-mode combined cooling, heating, and power (CCHP) system adaptable to all climate scenarios includes a PVT power generation module control method, a heat pump coupling module control method, and a cooling and heating supply module control method. Specifically, the PVT power generation module control method includes a PVT module-only power supply and heat storage mode, a PVT and grid-connected power supply and heat storage mode, and a PVT cooling power supply mode. The heat pump coupling module control method includes a heat pump-only heating mode, a glycol-only heating mode, and a combined cooling and heating mode. The cooling and heating supply module control method includes a separate hot water supply mode, a hot water supply combined with cooling mode, or a hot water supply combined with heating mode.

[0032] The control method for the PVT component's independent power supply heat storage mode is as follows: During the day, when the temperature sensor detects that the front temperature of the photovoltaic array 4 is less than the set threshold, and at the same time, the battery 3 has a charge greater than the set threshold, the ethylene glycol circulation pump 11, the first solenoid valve 10, and the second solenoid valve 8 are opened, while the third solenoid valve 7, the fourth solenoid valve 12, and the inverter control unit 2 are closed. At this time, the photovoltaic array 4 converts light energy into electrical energy and sends it to the battery 3 for storage, using the battery 3 to power the heat pump coupling module and the cold and heat supply module. During this process, the ethylene glycol working fluid in the ethylene glycol circulation pipe 5 absorbs the waste heat generated by the photovoltaic array 4 and the daytime heat, and then flows through the collection pipe 6. Driven by the ethylene glycol circulation pump 11, it enters the ethylene glycol heat storage and heat exchange tank 9 through the first solenoid valve 10 and the right working fluid inlet to store heat. After heat exchange, the cooled ethylene glycol working fluid flows back to the ethylene glycol circulation pipe 5 through the right working fluid outlet of the ethylene glycol heat storage and heat exchange tank 9, the second solenoid valve 8, and the collection pipe 6, completing the heat storage-circulation process. The control method for the PVT and grid-connected power supply thermal storage mode is as follows: During the daytime, when the temperature sensor detects that the front temperature of the photovoltaic array 4 is lower than the set threshold and the battery 3 charge is not greater than the set threshold, based on the PVT module-only power supply thermal storage mode, the inverter control unit 2 is turned on, so that the grid 1 is connected to the input terminal of the battery 3 synchronously through the inverter control unit 2 and the photovoltaic array 4, and the battery 3 is used to supply power to the heat pump coupling module and the cooling and heating supply module; during this process, the same heat exchange measures as the PVT module-only power supply thermal storage mode are used to cool the photovoltaic array 4. The control method of PVT cooling power supply mode is as follows: During the daytime and when the front temperature of photovoltaic array 4 is not lower than the set threshold, the first solenoid valve 10 and the second solenoid valve 8 are closed; the ethylene glycol circulation pump 11, the third solenoid valve 7, the fourth solenoid valve 12, and the air-cooled radiator 13 are turned on. At this time, the ethylene glycol working fluid in the ethylene glycol circulation pipe 5 flows through the collection pipe 6 and is driven by the ethylene glycol circulation pump 11 and enters the air-cooled radiator 13 through the fourth solenoid valve 12. The air-cooled radiator 13 cools the ethylene glycol working fluid. The cooled ethylene glycol working fluid flows back to the ethylene glycol circulation pipe 5 through the outlet of the air-cooled radiator 13, the third solenoid valve 7, and the collection pipe 6 to cool the photovoltaic array 4 until the front temperature of photovoltaic array 4 is lower than the set threshold. Then, switch back to the PVT independent power supply heat storage mode or the PVT and the grid power supply heat storage mode. The control method for the heat pump's standalone heating mode is as follows: When the heating and cooling supply module only needs heating, the heat exchange circulation pump 14, the fifth solenoid valve 15, the sixth solenoid valve 23, the compressor 32, the gas separator 31, the ninth solenoid valve 26, the liquid receiver 19, the tenth solenoid valve 30, the twelfth solenoid valve 18, and the hot water circulation pump 22 are turned off; the seventh solenoid valve 16, the eighth solenoid valve 24, the eleventh solenoid valve 29, the thirteenth solenoid valve 27, and the cold water circulation pump 28 are turned off; at this time, the high-temperature ethylene glycol working fluid in the ethylene glycol heat storage and heat exchange water tank 9 enters the ethylene glycol flow channel of the three-channel plate heat exchanger 17 through the left working fluid outlet, the heat exchange circulation pump 14, and the fifth solenoid valve 15, and exchanges heat with the refrigerant in the cold water flow channel of the three-channel plate heat exchanger 17, causing the refrigerant to heat up and vaporize; the vaporized refrigerant passes through the ninth solenoid valve 26, the gas separator 31, the liquid receiver 26, the liquid receiver 32, the liquid receiver 32, the liquid receiver 33, the liquid receiver 34, the liquid receiver 35, the liquid receiver 36, the liquid receiver 37, the liquid receiver 38, and the cold water circulation pump 28. At this time, the high-temperature ethylene glycol working fluid in the ethylene glycol heat storage and heat exchange water tank 9 enters the ethylene glycol flow channel of the three-channel plate heat exchanger 17 through the left working fluid outlet, the heat exchange circulation pump 14, and the fifth solenoid valve 15, and exchanges heat with the refrigerant in the cold water flow channel of the three-channel plate heat exchanger 17, causing the refrigerant to heat up The refrigerant from distributor 31 enters compressor 32, is compressed into high-temperature and high-pressure refrigerant, and then enters the cold water channel of the second plate heat exchanger 20. At the same time, hot water circulation pump 22 draws low-temperature hot water from the hot water storage tank 33, enters the hot water channel of the second plate heat exchanger 20 through the hot water outlet of the first plate heat exchanger 21, absorbs the heat of the high-temperature and high-pressure refrigerant, and then enters the hot water storage tank 33 through the hot water outlet of the second plate heat exchanger 20 for storage. The refrigerant that has cooled down after heat exchange flows back to the three-channel plate heat exchanger 17 through the cold water outlet of the second plate heat exchanger 20, the liquid receiver 19, and the tenth solenoid valve 30. The ethylene glycol working fluid that has cooled down after heat exchange flows back to the ethylene glycol hot water storage tank 9 through the ethylene glycol outlet of the three-channel plate heat exchanger 17, the sixth solenoid valve 23, and the working fluid inlet on the left side of the ethylene glycol hot water storage tank 9, thus completing the heat pump heating-circulation. The control method for the ethylene glycol standalone heating mode is as follows: When the heating load of the cold and hot supply module is lower than the set threshold, the compressor 32, gas separator 31, ninth solenoid valve 26, liquid receiver 19, tenth solenoid valve 30, fifth solenoid valve 15, sixth solenoid valve 23, and cold water circulation pump 28 are shut down; the heat exchange circulation pump 14, seventh solenoid valve 16, eighth solenoid valve 24, and hot water circulation pump 22 are turned on; at this time, the high-temperature ethylene glycol working fluid in the ethylene glycol heat storage and heat exchange tank 9 enters the ethylene glycol flow channel of the first plate heat exchanger 21 through the left working fluid outlet, heat exchange circulation pump 14, and seventh solenoid valve 16. The circulating hot water in the hot water channel of the first plate heat exchanger 21 exchanges heat with the circulating hot water; the hot water circulation pump 22 draws low-temperature hot water from the hot water storage tank 33, enters through the hot water inlet of the first plate heat exchanger 21, absorbs heat from the ethylene glycol, and then enters the hot water storage tank 33 through the hot water outlet of the first plate heat exchanger 21, the hot water inlet of the second plate heat exchanger 20, the hot water outlet of the second plate heat exchanger 20, and the hot water inlet of the hot water storage tank 33; the ethylene glycol working medium that has cooled down after heat exchange flows back to the ethylene glycol heat storage hot water tank 9 through the ethylene glycol outlet of the first plate heat exchanger 21 and the eighth solenoid valve 24, completing the direct heating-circulation of ethylene glycol; The control method for the combined cooling and heating mode is as follows: When the cooling and heating supply modules need to supply both cooling and heating simultaneously, the ethylene glycol circulation pump 11 is shut down based on the heat pump-only heating mode; at this time, the heating side maintains the heat pump-only heating mode process; simultaneously, the cold water circulation pump 28 draws ambient temperature water from the cold water storage tank 43, which enters the cold water channel through the cold water inlet of the three-channel plate heat exchanger 17, exchanges heat with the refrigerant to cool down, and then enters the cold water storage tank 43 for storage through the cold water outlet of the three-channel plate heat exchanger 17 and the cold water inlet of the cold water storage tank 43; during this process, if the three-channel plate heat exchanger... If the refrigerant temperature in 17 is lower than the set threshold, the eleventh solenoid valve 29, the thirteenth solenoid valve 27, and the direct evaporator 25 will be opened, and the twelfth solenoid valve 18 will be closed. The refrigerant will enter the direct evaporator 25 through the tenth solenoid valve 30 and the eleventh solenoid valve 29, absorb ambient heat, and then enter the compressor 32 through the thirteenth solenoid valve 27 and the gas separator 31 to replenish the heat pump cycle heat. Otherwise, the eleventh solenoid valve 29 and the thirteenth solenoid valve 27 will be closed, and the twelfth solenoid valve 18 will be opened. The refrigerant will enter the three-channel plate heat exchanger 17 through the twelfth solenoid valve 18 for heat replenishment. The control method for the standalone hot water supply mode is as follows: When the hot water supply equipment 35 sends a demand signal and the HVAC cooling and heating equipment 38 does not send a cooling or heating demand signal, the hot water supply circulation pump 34 and the fourteenth solenoid valve 36 are turned on; the hot and cold air supply circulation pump 37, the fifteenth solenoid valve 41, the sixteenth solenoid valve 42, the seventeenth solenoid valve 40, and the eighteenth solenoid valve 39 are turned off. At this time, the high-temperature hot water in the hot water storage tank 33 is transported to the hot water supply equipment 35 through the heating outlet, the fourteenth solenoid valve 36, and the hot water supply circulation pump 34 to meet the hot water demand. The control method for the combined hot water supply and cooling mode is as follows: The hot water supply equipment 35 sends a demand signal, and the HVAC cooling and heating equipment 38 sends a cooling demand signal. Based on the independent hot water supply mode, the sixteenth solenoid valve 42 and the seventeenth solenoid valve 40 of the hot and cold air supply circulation pump 37 are opened; the fifteenth solenoid valve 41 and the eighteenth solenoid valve 39 are closed. At this time, the hot water supply equipment 35 continuously receives hot water from the hot water storage tank 33 via the fourteenth solenoid valve 36 and the hot water supply circulation pump 34; the hot and cold air supply circulation pump 37 draws low-temperature cold water from the cold water storage tank 43 and enters the HVAC cooling and heating equipment 38 through the cooling outlet, the sixteenth solenoid valve 42, and the hot and cold air supply circulation pump 37. After the HVAC cooling and heating equipment 38 releases cooling capacity into the room, the heated cold water flows back to the cold water storage tank 43 through the seventeenth solenoid valve 40 and the cooling inlet of the cold water storage tank 43, completing the cooling-circulation. The control method for the combined hot water supply and heating mode is as follows: the hot water supply equipment 35 sends a demand signal, and the HVAC cooling and heating equipment 38 sends a heating demand signal; based on the independent hot water supply mode, the hot and cold air supply circulation pump 37, the fifteenth solenoid valve 41, and the eighteenth solenoid valve 39 are opened; the sixteenth solenoid valve 42 and the seventeenth solenoid valve 40 are closed; at this time, the hot water supply equipment 35 continuously receives hot water; the hot and cold air supply circulation pump 37 draws high-temperature hot water from the hot water storage tank 33, and enters the HVAC cooling and heating equipment 38 through the heating outlet, the fifteenth solenoid valve 41, and the hot and cold air supply circulation pump 37; after the HVAC cooling and heating equipment 38 releases heat into the room, the cooled hot water flows back to the hot water storage tank 33 through the eighteenth solenoid valve 39 and the heating inlet of the hot water storage tank 33, completing the heating-circulation.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solutions of the present invention, and these modifications or equivalent substitutions cannot cause the modified technical solutions to deviate from the spirit and scope of the technical solutions of the present invention.

Claims

1. A multi-mode combined cooling, heating and power system adapted to all-weather scenarios, characterized in that: The system comprises a PVT power generation module, a heat pump coupling module and a cold and heat supply module, wherein the PVT power generation module works in a PVT component alone power supply heat storage mode, a PVT and power grid combined power supply heat storage mode or a PVT cooling power supply mode, the heat pump coupling module works in a heat pump alone heat supply mode, a glycol alone heat supply mode or a combined cooling and heat supply mode, and the cold and heat supply module works in a alone hot water supply mode, a hot water supply combined cooling mode or a hot water supply combined heating mode.

2. The multi-mode combined cooling, heating and power system adapted to all-weather scenarios according to claim 1, characterized in that: The PVT power generation module comprises a PVT component and cooling components and heat storage heat exchange components respectively communicated with the PVT component, the front surface of a photovoltaic array of the PVT component is provided with a temperature sensor, the temperature sensor is electrically connected with the cooling components and the heat storage heat exchange components through a temperature controller, and circulating working medium of the cooling components and the heat storage heat exchange components is glycol, so that the running of the cooling components and the heat storage heat exchange components is switched through feedback temperature of the temperature sensor.

3. The multi-mode CCHP system adapted to all-weather scenarios according to claim 2, characterized in that: The heat storage heat exchange component comprises a glycol heat storage heat exchange water tank, and the cooling component comprises an air cooling radiator. The outlet and the inlet of the glycol circulating pipe are respectively communicated with the right side working medium inlet and the right side working medium outlet of the glycol heat storage heat exchange water tank through corresponding collecting pipes, a glycol circulating pump is arranged on the collecting pipe communicated with the right side working medium inlet of the glycol heat storage heat exchange water tank, a first electromagnetic valve is arranged on the collecting pipe between the glycol circulating pump and the glycol heat storage heat exchange water tank, a second electromagnetic valve is arranged on the collecting pipe communicated with the right side working medium outlet of the glycol heat storage heat exchange water tank, the first electromagnetic valve is communicated with the inlet of the air cooling radiator through a pipeline between the glycol circulating pump, the outlet of the air cooling radiator is communicated with the collecting pipe between the second electromagnetic valve and the inlet of the glycol circulating pipe, and a third electromagnetic valve and a fourth electromagnetic valve are respectively arranged on the outlet and the inlet of the air cooling radiator. The glycol heat storage heat exchange water tank is communicated with the heat pump coupling module.

4. The multi-mode CCHP system adapted to all-weather scenarios according to claim 3, characterized in that: The heat pump coupling module comprises a glycol heat release component and a heat pump coupling component, wherein the glycol heat release component comprises a three-channel plate heat exchanger, a first plate heat exchanger and a second plate heat exchanger, the glycol inlet of the three-channel plate heat exchanger is communicated with the left side working medium outlet of the glycol heat storage heat exchange water tank through a fifth electromagnetic valve and a heat exchange circulating pump in sequence, the glycol outlet of the three-channel plate heat exchanger is communicated with the left side working medium inlet of the glycol heat storage heat exchange water tank through a sixth electromagnetic valve, the fifth electromagnetic valve is communicated with the glycol inlet of the first plate heat exchanger through a seventh electromagnetic valve and a heat exchange circulating pump, and the glycol outlet of the first plate heat exchanger is connected to the sixth electromagnetic valve and the glycol heat storage heat exchange water tank through an eighth electromagnetic valve. The heat pump coupling component comprises a compressor, an air separator and a ninth electromagnetic valve arranged between the cold water inlet end of the second plate heat exchanger and the cold water outlet of the three-channel plate heat exchanger in sequence, and a liquid storage device and a tenth electromagnetic valve arranged between the cold water outlet end of the second plate heat exchanger and the cold water inlet of the three-channel plate heat exchanger in sequence. The first plate heat exchanger and the second plate heat exchanger are both communicated with a heat storage water tank of the cold and heat supply module.

5. The multi-mode CCHP system adapted to all-weather scenarios according to claim 4, characterized in that: The ethylene glycol heat release assembly further comprises a direct evaporator, an inlet of the direct evaporator being communicated with the tenth electromagnetic valve and the three-way plate heat exchanger through an eleventh electromagnetic valve, a twelfth electromagnetic valve being further arranged between the eleventh electromagnetic valve and the tenth electromagnetic valve, and an outlet of the direct evaporator being communicated with the gas separator and the ninth electromagnetic valve through a thirteenth electromagnetic valve.

6. The multi-mode CCHP system adapted to all-weather scenarios according to claim 5, characterized in that: The cold and heat supply module comprises a hot water storage tank, a cold water storage tank and an energy utilization device, a hot water inlet of the hot water storage tank being communicated with a hot water outlet of the second plate heat exchanger, a hot water outlet of the hot water storage tank being communicated with a hot water inlet of the first plate heat exchanger through a hot water circulating pump, and the hot water outlet of the first plate heat exchanger being communicated with the hot water inlet of the second plate heat exchanger; a cold water inlet of the cold water storage tank being communicated with a cold water outlet of the three-way plate heat exchanger through a cold water circulating pump, and a cold water outlet of the cold water storage tank being communicated with a cold water inlet of the three-way plate heat exchanger; a hot supply end of the hot water storage tank and a cold supply end of the cold water storage tank being communicated with the energy utilization device.

7. The multi-mode CCHP system adapted to all-weather scenarios according to claim 6, characterized in that: The energy utilization device comprises a hot water supply device and a heating, ventilation and air conditioning cooling and heating device, the hot water supply device being communicated with the hot supply outlet of the hot water storage tank through a hot water supply circulating pump and a fourteenth electromagnetic valve in sequence; an inlet of the heating, ventilation and air conditioning cooling and heating device being communicated with a fifteenth electromagnetic valve and a sixteenth electromagnetic valve through a cold and heat gas supply circulating pump in sequence, the fifteenth electromagnetic valve being communicated between the fourteenth electromagnetic valve and the hot water storage tank, the sixteenth electromagnetic valve being communicated with the cold supply outlet of the cold water storage tank, an outlet of the heating, ventilation and air conditioning cooling and heating device being communicated with a seventeenth electromagnetic valve and an eighteenth electromagnetic valve, the seventeenth electromagnetic valve being communicated with the cold supply inlet of the cold water storage tank, and the eighteenth electromagnetic valve being communicated with the hot supply inlet of the hot water storage tank.

8. The multi-mode CCHP system adapted to all-weather scenarios according to claim 7, characterized in that: The PVT power generation module further comprises a battery, an inverter control all-in-one machine and a power grid, the photovoltaic array being electrically connected with an input end of the battery, the input end of the battery being further electrically connected with the power grid through the inverter control all-in-one machine, and an output end of the battery being electrically connected with the heat pump coupling module and the cold and heat supply module.

9. The control method of a multi-mode CCHP system adapted to all-weather scenarios according to claim 8, characterized in that: The PVT power generation module control method, the heat pump coupling module control method and the cold and heat supply module control method are provided, wherein the PVT power generation module control method comprises a PVT component alone power storage mode, a PVT and power grid combined power storage mode and a PVT cooling power supply mode; the heat pump coupling module control method comprises a heat pump alone heating mode, an ethylene glycol alone heating mode and a combined cooling and heating mode; the cold and heat supply module control method comprises a hot water supply alone mode, a hot water supply combined cooling mode or a hot water supply combined heating mode.

10. The control method of a multi-mode CCHP system adapted to all-weather scenarios according to claim 9, characterized in that: The control method of the PVT assembly in the heat storage mode of separate power supply is as follows: when the daytime and the temperature sensor detects that the front temperature of the photovoltaic array is less than the set threshold, and at the same time, the battery power is greater than the set threshold, the glycol circulating pump, the first electromagnetic valve and the second electromagnetic valve are opened, and the third electromagnetic valve, the fourth electromagnetic valve and the inverter control integrated machine are closed, at this time, the photovoltaic array converts light energy into electric energy and transmits to the battery storage, and the battery is used to power the heat pump coupling module and the cold and heat supply module; in this process, the glycol working medium in the glycol circulating pipe absorbs the photovoltaic array waste heat and daytime heat, is converged through the collecting pipe, is driven by the glycol circulating pump, enters the glycol heat storage heat exchange water tank through the first electromagnetic valve and the right working medium inlet, and stores heat; the glycol working medium cooled after heat exchange flows back to the glycol circulating pipe through the right working medium outlet of the glycol heat storage heat exchange water tank, the second electromagnetic valve and the collecting pipe, and the heat storage-circulation is completed. The control method of the PVT assembly in the heat storage mode of combined power supply with the power grid is as follows: when the daytime and the temperature sensor detects that the front temperature of the photovoltaic array is lower than the set threshold, and the battery power is not greater than the set threshold, on the basis of the heat storage mode of separate power supply of the PVT assembly, the inverter control integrated machine is opened, the power grid is connected to the input end of the battery through the inverter control integrated machine and the photovoltaic array, and the battery is used to power the heat pump coupling module and the cold and heat supply module; in this process, the same heat exchange measures as the heat storage mode of separate power supply of the PVT assembly are used to cool the photovoltaic array; The control method of the PVT cooling power supply mode is as follows: when the daytime and the front temperature of the photovoltaic array is not lower than the set threshold, the first electromagnetic valve and the second electromagnetic valve are closed; the glycol circulating pump, the third electromagnetic valve, the fourth electromagnetic valve and the air-cooled radiator are opened, at this time, the glycol working medium in the glycol circulating pipe is converged through the collecting pipe, is driven by the glycol circulating pump, enters the air-cooled radiator through the fourth electromagnetic valve, and is cooled by the air-cooled radiator; the glycol working medium cooled after cooling flows back to the glycol circulating pipe through the air-cooled radiator outlet, the third electromagnetic valve and the collecting pipe, and the photovoltaic array is cooled until the front temperature of the photovoltaic array is lower than the set threshold, and the heat storage mode of separate power supply or the heat storage mode of combined power supply with the power grid of the PVT is switched back. The control method of the heat pump alone heating mode is as follows: when the cold and heat supply module only needs to supply heat, the heat exchange circulating pump, the fifth electromagnetic valve, the sixth electromagnetic valve, the compressor, the gas separator, the ninth electromagnetic valve, the liquid accumulator, the tenth electromagnetic valve, the twelfth electromagnetic valve and the hot water circulating pump are opened; the seventh electromagnetic valve, the eighth electromagnetic valve, the eleventh electromagnetic valve, the thirteenth electromagnetic valve and the cold water circulating pump are closed; at this time, the high-temperature ethylene glycol working medium in the ethylene glycol heat storage heat exchanger tank enters the ethylene glycol flow channel of the three-channel plate heat exchanger through the left working medium outlet, the heat exchange circulating pump and the fifth electromagnetic valve, exchanges heat with the refrigerant in the cold water flow channel of the three-channel plate heat exchanger, and the refrigerant is warmed and vaporized; the vaporized refrigerant enters the compressor through the ninth electromagnetic valve and the gas separator, is compressed into high-temperature and high-pressure refrigerant, and then enters the cold water flow channel of the second plate heat exchanger; at the same time, the hot water circulating pump extracts low-temperature hot water in the heat storage water tank, enters the hot water flow channel of the second plate heat exchanger through the hot water outlet of the first plate heat exchanger, absorbs the heat of the high-temperature and high-pressure refrigerant, and then enters the heat storage water tank through the hot water outlet of the second plate heat exchanger for storage; the refrigerant after heat exchange and cooling returns to the three-channel plate heat exchanger through the hot water outlet of the second plate heat exchanger, the liquid accumulator and the tenth electromagnetic valve; the ethylene glycol working medium after heat exchange and cooling returns to the ethylene glycol heat storage heat exchanger tank through the ethylene glycol outlet of the three-channel plate heat exchanger, the sixth electromagnetic valve and the left working medium inlet of the ethylene glycol heat storage heat exchanger tank, and the heat pump heating cycle is completed; The control method of the ethylene glycol alone heating mode is as follows: when the heating load of the cold and heat supply module is lower than the set threshold, the compressor, the gas separator, the ninth electromagnetic valve, the liquid accumulator, the tenth electromagnetic valve, the fifth electromagnetic valve, the sixth electromagnetic valve and the cold water circulating pump are closed; the heat exchange circulating pump, the seventh electromagnetic valve and the eighth electromagnetic valve are opened; at this time, the high-temperature ethylene glycol working medium in the ethylene glycol heat storage heat exchanger tank enters the ethylene glycol flow channel of the first plate heat exchanger through the left working medium outlet, the heat exchange circulating pump and the seventh electromagnetic valve, exchanges heat with the circulating hot water in the hot water flow channel of the first plate heat exchanger; the hot water circulating pump extracts low-temperature hot water in the heat storage water tank, enters the first plate heat exchanger through the hot water inlet, absorbs the heat of the ethylene glycol, and then enters the heat storage water tank through the hot water outlet of the first plate heat exchanger, the hot water inlet of the second plate heat exchanger, the hot water outlet of the second plate heat exchanger and the hot water inlet of the heat storage water tank; the ethylene glycol working medium after heat exchange and cooling returns to the ethylene glycol heat storage heat exchanger tank through the ethylene glycol outlet of the first plate heat exchanger and the eighth electromagnetic valve, and the ethylene glycol direct heating cycle is completed. The control method of the combined cooling and heating mode is as follows: when the cold and heat supply module needs to supply cold and heat at the same time, on the basis of the heat pump alone heating mode, the ethylene glycol circulating pump is closed; at this time, the heat supply side maintains the heat pump alone heating mode process; at the same time, the normal temperature water in the cold water storage tank is extracted by the cold water circulating pump, enters the cold water flow channel through the three-channel plate heat exchanger cold water inlet, exchanges heat with the refrigerant to reduce the temperature, and then enters the cold water storage tank for storage through the three-channel plate heat exchanger cold water outlet and the cold water inlet of the cold water storage tank; in this process, if the temperature of the refrigerant in the three-channel plate heat exchanger is lower than the set threshold, the eleventh electromagnetic valve, the thirteenth electromagnetic valve and the direct evaporator are opened, the twelfth electromagnetic valve is closed, the refrigerant enters the direct evaporator through the tenth electromagnetic valve and the eleventh electromagnetic valve, absorbs environmental heat, and then enters the compressor through the thirteenth electromagnetic valve and the gas distributor to supplement the heat pump circulating heat; otherwise, the eleventh electromagnetic valve and the thirteenth electromagnetic valve are closed, and the twelfth electromagnetic valve is opened, the refrigerant enters the three-channel plate heat exchanger through the twelfth electromagnetic valve for heat supplement; The control method of the single hot water supply mode is as follows: the hot water supply device sends a demand signal, and the heating, ventilation and air conditioning cooling and heating device does not send a cooling or heating demand signal, the hot water supply circulating pump and the fourteenth electromagnetic valve are opened; the cold and hot gas supply circulating pump, the fifteenth electromagnetic valve, the sixteenth electromagnetic valve, the seventeenth electromagnetic valve and the eighteenth electromagnetic valve are closed; at this time, the high-temperature hot water in the hot water storage tank is transported to the hot water supply device through the heat supply outlet, the fourteenth electromagnetic valve and the hot water supply circulating pump to meet the hot water demand; The control method of the hot water supply combined cooling mode is as follows: the hot water supply device sends a demand signal, and the heating, ventilation and air conditioning cooling and heating device sends a cooling demand signal, on the basis of the single hot water supply mode, the cold and hot gas supply circulating pump, the sixteenth electromagnetic valve and the seventeenth electromagnetic valve are opened; the fifteenth electromagnetic valve and the eighteenth electromagnetic valve are closed; at this time, the hot water supply device continuously receives the hot water transported from the hot water storage tank through the fourteenth electromagnetic valve and the hot water supply circulating pump; the cold and hot gas supply circulating pump extracts the low-temperature cold water in the cold water storage tank, enters the heating, ventilation and air conditioning cooling and heating device through the cooling outlet, the sixteenth electromagnetic valve and the cold and hot gas supply circulating pump, the heating, ventilation and air conditioning cooling and heating device releases cold to the indoor, the temperature of the cold water is raised, and the cold water returns to the cold water storage tank through the seventeenth electromagnetic valve and the cold supply inlet of the cold water storage tank to complete the cooling-circulation; The control method of the hot water supply combined heating mode is as follows: the hot water supply device sends a demand signal, and the heating, ventilation and air conditioning cooling and heating device sends a heating demand signal; on the basis of the single hot water supply mode, the cold and hot gas supply circulating pump, the fifteenth electromagnetic valve and the eighteenth electromagnetic valve are opened; the sixteenth electromagnetic valve and the seventeenth electromagnetic valve are closed; at this time, the hot water supply device continuously receives the hot water; the cold and hot gas supply circulating pump extracts the high-temperature hot water in the hot water storage tank, enters the heating, ventilation and air conditioning cooling and heating device through the heat supply outlet, the fifteenth electromagnetic valve and the cold and hot gas supply circulating pump, the heating, ventilation and air conditioning cooling and heating device releases heat to the indoor, the temperature of the hot water is lowered, and the hot water returns to the hot water storage tank through the eighteenth electromagnetic valve and the heat supply inlet of the hot water storage tank to complete the heating-circulation.

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