Circulating type solar photovoltaic photo-thermal heat pump quadruple supply system

Abstract

The invention belongs to the technical field of solar energy utilization and building heating ventilation air conditioning, and provides a circulating type solar photovoltaic photo-thermal heat pump quadruple supply system which comprises a water source heat pump unit, a PV / T assembly, a domestic hot water tank, an air conditioner water tank, an air cooling heat pump unit, a photovoltaic inverter and a water source heat pump primary circulating pump. The PV / T assembly is organically integrated with core equipment such as the water source heat pump unit and the air-cooled heat pump unit, precise control under different seasons and different working conditions is achieved by means of the medium loop switching assembly and the cut-off assembly, the four-combined-supply functions of refrigerating, heating, water heating and power generation are integrated, the photovoltaic power generation efficiency is improved, energy waste is greatly reduced, and the energy consumption is reduced. The comprehensive energy efficiency of the system is improved, meanwhile, equipment loss caused by frequent switching of working conditions of a traditional system is avoided, the service life is prolonged, the installation space and cost of an independent system are reduced through integrated design, and the system is suitable for various building scenes and meets the requirements for building energy saving and renewable energy utilization.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of solar energy utilization and building heating, ventilation and air conditioning, and particularly relates to a circulating solar photovoltaic-thermal heat pump quadruple supply system. BACKGROUND

[0002] Solar photovoltaic / thermal (PV / T) technology combines photovoltaic power generation and photothermal together to achieve high solar energy utilization. To meet the requirements of the General Code for Building Energy Efficiency and Renewable Energy Utilization, the roof of a building is usually provided with a photovoltaic power generation system or a solar water heating system (solar panel + air source heat pump). An air source heat pump is usually used for refrigeration and heating. However, these systems are usually independent and separate. The solar water heating system absorbs heat from outdoor air to heat water, and the air conditioner releases indoor heat to the outdoor air when cooling. The cold and heat of the two systems cannot be complementary. The photovoltaic panel of the photovoltaic power generation system has a reduced power generation efficiency due to the temperature rise. The waste heat is not utilized. The traditional triple supply (refrigeration, heating, and hot water) system relies on a fluorine system pipeline to switch to achieve function conversion, which causes the working condition of the compressor to frequently fluctuate, shortens the service life, and cannot integrate the photovoltaic power generation function. The independent system needs to be separately designed and installed with space and pipeline, which increases the building load and cost and does not meet the requirements of the General Code for Building Energy Efficiency and Renewable Energy Utilization.

[0003] However, the solar water heating system absorbs heat from outdoor air to heat water through an air source heat pump, and the air conditioner releases indoor heat to the outdoor air when cooling. The cold and heat of the two systems cannot be complementary. The photovoltaic panel of the photovoltaic power generation system has a reduced power generation efficiency due to the temperature rise. The waste heat is not utilized. The traditional triple supply (refrigeration, heating, and hot water) system relies on a fluorine system pipeline to switch to achieve function conversion, which causes the working condition of the compressor to frequently fluctuate, shortens the service life, and cannot integrate the photovoltaic power generation function. The independent system needs to be separately designed and installed with space and pipeline, which increases the building load and cost and does not meet the requirements of the General Code for Building Energy Efficiency and Renewable Energy Utilization.

[0004] Therefore, the present application provides a circulating solar photovoltaic-thermal heat pump quadruple supply system to solve the problems of the prior art.

[0005] The above information disclosed in the background of the present application is only used to increase the understanding of the background of the present application, and therefore, it can include prior art known to those skilled in the art. SUMMARY

[0006] To solve the above technical problems, the present application provides a circulating solar photovoltaic-thermal heat pump quadruple supply system to solve the problems of the prior art, such as the photovoltaic power generation or solar water heating system, the unutilized cold and heat, the poor system stability, and the low integration.

[0007] To achieve the above purpose, the present application provides a circulating solar photovoltaic-thermal heat pump quadruple supply system, which comprises a water source heat pump unit, a PV / T assembly, a domestic hot water tank, an air conditioning water tank, a wind-cooled heat pump unit, a photovoltaic inverter, a water source heat pump primary circulation pump, a water source heat pump secondary circulation pump, a wind-cooled heat pump primary circulation pump, an air conditioning circulation pump, a domestic hot water supply and circulation pump, a medium circuit switching assembly, and a stop assembly.

[0008] The PV / T assembly is connected with the water source heat pump unit through a pipeline, and the water source heat pump primary circulation pump is arranged on the pipeline between the PV / T assembly and the water source heat pump unit.

[0009] The domestic hot water tank and the air conditioning water tank are respectively connected with the water source heat pump unit through pipelines, and the water source heat pump secondary circulation pump is arranged on the pipeline between the water source heat pump unit and the domestic hot water tank and the air conditioning water tank.

[0010] The air-cooled heat pump unit is connected with the air conditioning water tank through a pipeline, and the air-cooled heat pump primary circulation pump is arranged on the pipeline between the air-cooled heat pump unit and the air conditioning water tank.

[0011] The air conditioning circulation pump is arranged on the pipeline between the air conditioning water tank and the external air conditioning terminal.

[0012] The domestic hot water supply and circulation pump is arranged on the water outlet pipeline of the domestic hot water tank.

[0013] The photovoltaic inverter is electrically connected with the PV / T assembly.

[0014] The medium loop switching assembly is arranged on the pipeline connected with the PV / T assembly, the air conditioning water tank and the water source heat pump unit.

[0015] The cut-off assembly is arranged on the pipeline for switching between the refrigeration season and the heating season.

[0016] Preferably, the PV / T assembly comprises a photovoltaic power generation module and a heat exchange plate, the photovoltaic power generation module is fixedly connected with the heat exchange plate, and a channel for flowing of a heat conducting medium is formed in the heat exchange plate.

[0017] Preferably, the heat conducting medium in the heat exchange plate is a glycol solution.

[0018] Preferably, the water source heat pump unit is provided with an evaporator and a condenser, and the evaporator and the condenser both flow with a heat conducting medium.

[0019] Preferably, the domestic hot water tank is provided with a first coil pipe inside, and the air conditioning water tank is provided with a second coil pipe inside.

[0020] Preferably, the medium loop switching assembly comprises a first electric two-way valve, a second electric two-way valve, a third electric two-way valve, a fourth electric two-way valve, a fifth electric two-way valve and a sixth electric two-way valve, wherein the first electric two-way valve and the second electric two-way valve are arranged on the pipeline connected with the PV / T assembly and the water source heat pump unit, the third electric two-way valve and the fourth electric two-way valve are arranged on the pipeline connected with the air conditioning water tank and the water source heat pump unit, and the fifth electric two-way valve and the sixth electric two-way valve are arranged on the pipeline connected with the domestic hot water tank and the water source heat pump unit.

[0021] Preferably, the cut-off assembly comprises a first cut-off valve, a second cut-off valve, a third cut-off valve and a fourth cut-off valve, wherein the first cut-off valve and the second cut-off valve are arranged on the pipeline for operation in the refrigeration season, and the third cut-off valve and the fourth cut-off valve are arranged on the pipeline for operation in the heating season.

[0022] Preferably, the photovoltaic inverter is electrically connected with an external power grid.

[0023] Preferably, the domestic hot water tank is connected with an external domestic water pipeline.

[0024] Preferably, the photovoltaic power generation module of the PV / T assembly comprises a TPT backboard, an EVA adhesive film, silicon cell pieces and a glass plate, the TPT backboard is fixedly connected with the heat exchange plate, the silicon cell pieces are arranged in multiple pieces and are arranged in the EVA adhesive film, and the glass plate is arranged outside the EVA adhesive film.

[0025] Compared with the prior art, the application has the following beneficial effects:

[0026] The application organically integrates the PV / T assembly with core equipment such as a water source heat pump unit and an air-cooled heat pump unit, realizes precise control in different seasons and different working conditions by means of a medium loop switching assembly and a cut-off assembly, can realize electric energy output by the photovoltaic power generation module of the PV / T assembly, can recover photovoltaic waste heat and environmental heat through the heat exchange plate, realizes cascade utilization of energy in cooperation with the water source heat pump unit, can recover air conditioner refrigeration waste heat to prepare domestic hot water in summer, can ensure that the domestic hot water meets the heating demand in winter, focuses on domestic hot water supply in the transition season, integrates the functions of "refrigeration, heating, hot water preparation and power generation", not only improves the photovoltaic power generation efficiency, but also greatly reduces energy waste, improves the comprehensive energy efficiency of the system, avoids equipment wear caused by frequent switching of working conditions in the traditional system, prolongs the service life, and the integrated design reduces the installation space and cost of independent systems, is suitable for various building scenes, and meets the needs of building energy saving and renewable energy utilization.

[0027] The above summary is only for the purpose of the description and is not intended to limit in any way. In addition to the illustrative aspects, embodiments and features described above, further aspects, embodiments and features will be readily apparent to those skilled in the art by reference to the drawings and the following detailed description. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 is a working principle schematic diagram of a circulating solar photovoltaic photothermal heat pump quadricombustion system in an embodiment of the application;

[0029] Figure 2 is a structure schematic diagram of a PV / T assembly of a circulating solar photovoltaic photothermal heat pump quadricombustion system in an embodiment of the application;

[0030] Figure 3 Figure 1 is a schematic diagram of the switching of a cutoff assembly in a circulating solar photovoltaic photothermal heat pump quadruple supply system according to an embodiment of the present application.

[0031] In the figure: 1, water source heat pump unit; 101, evaporator; 102, condenser; 2, PV / T assembly; 201, TPT backboard; 202, EVA adhesive film; 203, silicon cell piece; 204, glass plate; 205, heat exchange plate; 3, domestic hot water tank; 301, first coil pipe; 4, air conditioning water tank; 401, second coil pipe; 5, air-cooled heat pump unit; 6, photovoltaic inverter; 7, water source heat pump primary circulation pump; 8, water source heat pump secondary circulation pump; 9, air-cooled heat pump primary circulation pump; 10, air conditioning circulation pump; 11, domestic hot water supply and circulation pump; 12, medium circuit switching assembly; 1201, first electric two-way valve; 1202, second electric two-way valve; 1203, third electric two-way valve; 1204, fourth electric two-way valve; 1205, fifth electric two-way valve; 1206, sixth electric two-way valve; 13, cutoff assembly; 1301, first cutoff valve; 1302, second cutoff valve; 1303, third cutoff valve; 1304, fourth cutoff valve. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. It should be noted that the drawings are schematic and not drawn to scale. For the clarity and convenience of the drawings, the relative sizes and proportions of the parts shown in the drawings are exaggerated or reduced to illustrate the drawings, and any size is only exemplary and not limiting.

[0033] Embodiment:

[0034] Please refer to Figure 1 - Figure 3As shown, a circulating solar photovoltaic photothermal heat pump four-in-one system includes a water source heat pump unit 1, a PV / T assembly 2, a domestic hot water tank 3, an air conditioning water tank 4, an air-cooled heat pump unit 5, a photovoltaic inverter 6, a water source heat pump primary circulation pump 7, a water source heat pump secondary circulation pump 8, an air-cooled heat pump primary circulation pump 9, an air conditioning circulation pump 10, a domestic hot water supply and circulation pump 11, a medium circuit switching assembly 12, and a cutoff assembly 13. The water source heat pump unit 1 absorbs and transfers heat through an internal evaporator 101 and a condenser 102, without the need for a four-way reversing valve, and can realize refrigeration / heating mode switching through pipeline valve control, ensuring stable operating conditions. The PV / T assembly 2, as a composite assembly integrating photovoltaic power generation and photothermal utilization, is the core energy input unit of the system. The domestic hot water tank 3 is used to store domestic hot water, and the air conditioning water tank 4 is used to store air conditioning cold / hot water. The air-cooled heat pump unit 5 is used as an auxiliary cold / hot source equipment for the air conditioning system, which is started when the air conditioning water tank 4 is insufficient in cold or heat, and supplements energy through air heat exchange (releases heat to the air in summer and absorbs heat from the air in winter), ensuring stable operation of the air conditioning system. The photovoltaic inverter 6 is used to realize electric energy conversion, converting direct current generated by the PV / T assembly 2 into alternating current that meets grid standards and is connected to the external power grid, completing the terminal conversion of the "power generation" function. The water source heat pump primary circulation pump 7 is a power device that drives the heat-conducting medium to flow between the PV / T assembly 2 and the water source heat pump unit 1, ensuring that the heat absorbed by the PV / T assembly 2 is stably transferred to the evaporator 101 of the water source heat pump unit 1. The water source heat pump secondary circulation pump 8 is a power device that drives the heat-conducting medium to flow between the water source heat pump unit 1 and the domestic hot water tank 3 and the air conditioning water tank 4, transferring the heat released by the condenser 102 to the domestic hot water tank 3 or the air conditioning water tank 4. The air-cooled heat pump primary circulation pump 9 is a power device that drives the medium to flow between the air-cooled heat pump unit 5 and the air conditioning water tank 4, transferring the cold / heat generated by the air-cooled heat pump unit 5 to the air conditioning water tank 4 when the air conditioning water tank 4 is insufficient in energy. The air conditioning circulation pump 10 is a power device that drives the cold / hot water in the air conditioning water tank 4 to flow to the external air conditioning terminal (such as a fan coil), realizing terminal energy delivery of the "cooling / heating" function. The domestic hot water supply and circulation pump 11 is used to deliver hot water in the domestic hot water tank 3 to the external domestic water pipeline (such as a faucet), realizing terminal supply of the "hot water" function, and can also drive the hot water to circulate between the tank and the water use point, avoiding temperature drop of the hot water in the pipeline and ensuring that the water use point can instantly obtain hot water. The medium circuit switching assembly 12 realizes switching of different circuits through on-off control, and the cutoff assembly 13 is used to realize system mode switching between the refrigeration season and the heating season.

[0035] The PV / T assembly 2 is connected with the water source heat pump unit 1 through a pipeline, and a water source heat pump primary circulation pump 7 is arranged on the pipeline between the PV / T assembly 2 and the water source heat pump unit 1. The heat exchange plate 205 of the PV / T assembly 2 forms a closed loop with the evaporator 101 of the water source heat pump unit 1 through a corrosion-resistant metal pipeline, and the pipeline is filled with ethylene glycol solution as a heat conducting medium, which can avoid freezing and efficiently transfer heat in a low temperature environment. The water source heat pump primary circulation pump 7 is connected in series in the loop, which changes the medium flow by adjusting the rotating speed to ensure that the photovoltaic waste heat and environmental heat absorbed by the PV / T assembly 2 can be stably delivered to the evaporator 101 to provide a continuous low-temperature heat source for the water source heat pump unit 1, and meanwhile, the heat output of the PV / T assembly 2 is matched with the demand of the water source heat pump through flow adjustment;

[0036] The domestic hot water tank 3 and the air conditioning water tank 4 are respectively connected with the water source heat pump unit 1 through pipelines, and a water source heat pump secondary circulation pump 8 is arranged on the pipeline between the water source heat pump unit 1 and the domestic hot water tank 3 and the air conditioning water tank 4. The first coil pipe 301 of the domestic hot water tank 3 and the second coil pipe 401 of the air conditioning water tank 4 are respectively connected with the condenser 102 of the water source heat pump unit 1 through independent pipelines to form two parallel heat output loops, and a heat conducting medium flowing in the pipelines is responsible for transferring the heat generated by the condenser 102 to the water tanks. The water source heat pump secondary circulation pump 8 is arranged on the main pipe between the condenser 102 and the two water tanks, and can deliver heat to the domestic hot water tank 3 and the air conditioning water tank 4 separately or simultaneously through valve switching. The operating power of the water source heat pump secondary circulation pump 8 is dynamically adjusted according to the target temperature of the water tanks to ensure the balance between heat transfer efficiency and energy consumption.

[0037] The air-cooled heat pump unit 5 is connected with the air conditioning water tank 4 through a pipeline, and an air-cooled heat pump primary circulation pump 9 is arranged on the pipeline between the air-cooled heat pump unit 5 and the air conditioning water tank 4. The inlet and outlet of the air-cooled heat pump unit 5 are connected with the second coil pipe 401 of the air conditioning water tank 4 through a heat preservation pipeline to form an auxiliary cold and heat supply loop, which is used to supplement energy when the heat of the PV / T assembly 2 is insufficient or the air conditioning load is at a peak value. The air-cooled heat pump primary circulation pump 9 is installed at the inlet end of the loop, and can be automatically started and stopped according to the real-time water temperature of the air conditioning water tank 4 to transfer the cold or heat generated by the air-cooled heat pump to the second coil pipe 401 through the driving medium circulation, so as to quickly adjust the temperature of the air conditioning water tank 4 to meet the load demand.

[0038] An air conditioning circulation pump 10 is arranged on the pipeline between the air conditioning water tank 4 and external air conditioning terminals. The water outlet of the air conditioning water tank 4 is connected to the fan coil, floor heating and other external air conditioning terminals through a water supply main pipe, and the water return port receives the return medium of the terminals through a water return main pipe to form an air conditioning delivery and distribution loop. The air conditioning circulation pump 10 is arranged at the starting section of the water supply main pipe, and adjusts the output power according to the load signal fed back by the terminal temperature controller to ensure that the cold / hot water in the air conditioning water tank 4 is delivered to the terminals at a stable flow rate to realize indoor refrigeration or heating through terminal heat exchange, and meanwhile, the ordered circulation of the medium in the loop is maintained.

[0039] The domestic hot water supply and circulating pump 11 is arranged on the outlet pipeline of the domestic hot water tank 3, and the outlet pipeline of the domestic hot water tank 3 is divided into a water supply branch (connected to a water point such as a faucet or a shower) and a circulating branch (reflux to the water tank), and the two branches are switched by a three-way valve. The domestic hot water supply and circulating pump 11 has two functions: one is to start the water supply mode when water is used, and to pressurize and deliver the hot water at 50-55℃ in the domestic hot water tank 3 to the water point; the other is to start the circulating mode during the non-water use period, and to drive the cold water in the pipeline to reflux to the domestic hot water tank 3 for reheating, so as to avoid the cold water being discharged first when the water point is opened, and to ensure instant heating.

[0040] The photovoltaic inverter 6 is electrically connected with the PV / T assembly 2. The silicon cell sheet 203 of the PV / T assembly 2 is connected with the input end of the photovoltaic inverter 6 through internal wires and a direct-current cable, to form a photovoltaic power generation conversion loop. The photovoltaic inverter 6 converts the direct-current electricity (voltage fluctuates with light intensity) generated by the silicon cell sheet 203 into alternating-current electricity (such as 220V / 380V, 50Hz) meeting the grid standard. The output end is connected to the external power grid through an alternating-current cable, to realize grid-connected utilization of photovoltaic power generation, and has overcurrent and overvoltage protection functions, to ensure safe and stable operation of the power generation system.

[0041] The medium loop switching assembly 12 is arranged on the pipeline connecting the PV / T assembly 2, the air conditioner water tank 4 and the water source heat pump unit 1. The valves are linked through a central controller, and are switched to open or close according to seasonal modes and load requirements, to realize precise combination of different energy loops.

[0042] The cutoff assembly 13 is arranged on the pipeline for switching between the refrigeration season and the heating season. The two groups of valves are alternately opened and closed, to realize hard switching of the seasonal mode, avoid pipeline cross-flow in different seasons, and ensure efficient operation of the system according to the design logic.

[0043] Specifically, the PV / T assembly 2 includes a photovoltaic power generation module and a heat exchange plate 205. The photovoltaic power generation module is fixedly connected with the heat exchange plate 205. The heat exchange plate 205 has a channel for flowing of a heat-conducting medium. The photovoltaic power generation module is used for absorbing solar radiation and converting it into direct-current electricity. The heat exchange plate 205 absorbs waste heat generated during power generation of the silicon cell sheet 203 (to reduce the temperature of the cell to improve the power generation efficiency), and absorbs environmental heat through natural convection with air.

[0044] Further, the heat-conducting medium in the heat exchange plate 205 is a glycol solution.

[0045] Furthermore, an evaporator 101 and a condenser 102 are provided in the water source heat pump unit 1, and a heat-conducting medium flows inside the evaporator 101 and the condenser 102. The evaporator 101 is used to absorb heat from a low-temperature heat source (such as a PV / T component 2 and an air-conditioning water tank 4), and the condenser 102 is used to release heat to a high-temperature heat source (such as a domestic hot water tank 3 and an air-conditioning water tank 4).

[0046] Furthermore, a first coil 301 is provided inside the domestic hot water tank 3, and a second coil 401 is provided inside the air-conditioning water tank 4. The first coil 301 is a heat exchange carrier. When the water source heat pump unit 1 supplies domestic hot water, the heat transfer medium flows in the coil and releases heat, heating the water in the domestic hot water tank 3 to a set temperature (such as 50-55°C) to achieve the "hot water making" function. The second coil 401 is used to exchange heat with the water source heat pump unit 1 or the air-cooled heat pump unit 5. In summer, the coil absorbs cold energy to lower the water temperature in the air-conditioning water tank 4 (for air conditioning cooling), and in winter, the coil absorbs heat to increase the water temperature (for air conditioning heating).

[0047] Furthermore, the medium circuit switching component 12 includes a first electric two-way valve 1201, a second electric two-way valve 1202, a third electric two-way valve 1203, a fourth electric two-way valve 1204, a fifth electric two-way valve 1205, and a sixth electric two-way valve 1206, wherein the first electric two-way valve 1201 and the second electric two-way valve 1202 are arranged on the pipeline connecting the PV / T component 2 and the water source heat pump unit 1, the third electric two-way valve 1203 and the fourth electric two-way valve 1204 are arranged on the pipeline connecting the air conditioning water tank 4 and the water source heat pump unit 1, and the fifth electric two-way valve 1205 and the sixth electric two-way valve 1206 are arranged on the pipeline connecting the domestic hot water tank 3 and the water source heat pump unit 1. On the pipeline connected to group 1, the first electric two-way valve 1201 and the second electric two-way valve 1202 are arranged on the connecting pipeline between the PV / T component 2 and the water source heat pump unit 1 to control the medium flow between the PV / T component 2 and the water source heat pump unit 1, the third electric two-way valve 1203 and the fourth electric two-way valve 1204 are arranged on the connecting pipeline between the air-conditioning water tank 4 and the water source heat pump unit 1 to control the medium flow between the air-conditioning water tank 4 and the water source heat pump unit 1, the fifth electric two-way valve 1205 and the sixth electric two-way valve 1206 are arranged on the connecting pipeline between the domestic hot water tank 3 and the water source heat pump unit 1 to control the medium flow between the domestic hot water tank 3 and the water source heat pump unit 1.

[0048] Further, the cut-off assembly 13 comprises a first cut-off valve 1301, a second cut-off valve 1302, a third cut-off valve 1303 and a fourth cut-off valve 1304, wherein the first cut-off valve 1301 and the second cut-off valve 1302 are arranged on the pipeline for operation in the refrigeration season, the third cut-off valve 1303 and the fourth cut-off valve 1304 are arranged on the pipeline for operation in the heating season, the first cut-off valve 1301 and the second cut-off valve 1302 are arranged on the pipeline for operation in the refrigeration season, are opened during refrigeration to make the system circulate according to the refrigeration logic, and are closed during heating to cut off the pipeline for operation in the refrigeration season, the third cut-off valve 1303 and the fourth cut-off valve 1304 are arranged on the pipeline for operation in the heating season, are opened during heating to make the system circulate according to the heating logic, and are closed during refrigeration to cut off the pipeline for operation in the heating season.

[0049] Further, the photovoltaic inverter 6 is electrically connected with the external power grid.

[0050] Further, the domestic hot water tank 3 is connected with the external domestic water pipeline.

[0051] Further, the photovoltaic power generation module of the PV / T assembly 2 comprises a TPT backboard 201, an EVA adhesive film 202, silicon cell pieces 203 and a glass plate 204, the TPT backboard 201 is fixedly connected with the heat exchange plate 205, the silicon cell pieces 203 are arranged in multiple pieces and are arranged in the EVA adhesive film 202, the glass plate 204 is arranged outside the EVA adhesive film 202, the TPT backboard 201 is located at the bottom of the photovoltaic power generation module, has the properties of aging resistance and waterproofness, is used for protecting the internal silicon cell pieces 203, and is fixedly connected with the heat exchange plate 205 to realize structural support, the EVA adhesive film 202 wraps the silicon cell pieces 203, has good light transmittance and adhesion, bonds the silicon cell pieces 203, the glass plate 204 and the TPT backboard 201 into an integral whole, meanwhile, insulates water vapor and protects the cell pieces, the silicon cell pieces 203, as the core component of photovoltaic power generation, absorb solar radiation energy and convert it into direct current, the glass plate 204 is located at the outermost layer of the PV / T assembly 2, has strong light transmittance, is used for protecting the internal photovoltaic power generation module from damage by external environment (such as wind, rain and dust), and reduces light reflection to improve light absorption efficiency.

[0052] Working principle: when the system is running, the PV / T assembly 2 and the evaporator 101 and the condenser 102 of the water source heat pump unit 1 circulate the heat-conducting medium (such as ethylene glycol solution, which is antifreezing and has strong heat conductivity), the domestic hot water tank 3 and the air conditioning water tank 4 circulate water (or softened water to avoid fouling), each pump and valve is initially closed, and is started and stopped according to the logic only when the operating conditions are met.

[0053] Summer refrigeration mode: air conditioning refrigeration, domestic hot water preparation and photovoltaic power generation are cooperatively operated;

[0054] Valve state: the first and second stop valves 1301, 1302 in the stop component 13 are open, and the third and fourth stop valves 1303, 1304 are closed; the fifth and sixth electric two-way valves 1205, 1206 in the medium loop switching component 12 are always open;

[0055] Hot water preparation:

[0056] When the water temperature in the hot water tank 3 is less than 50℃, the water source heat pump unit 1, the water source heat pump primary circulation pump 7, and the water source heat pump secondary circulation pump 8 are started;

[0057] If the air conditioning load is small, the first and second electric two-way valves 1201, 1202 in the medium loop switching component 12 are open, and the third and fourth electric two-way valves 1203, 1204 are closed: the photovoltaic waste heat and environmental heat absorbed by the heat exchange plate 205 of the PV / T component 2 are transported to the evaporator 101 through the water source heat pump primary circulation pump 7 via the heat conducting medium, the water source heat pump unit 1 works to transfer the heat to the condenser 102, and then the heat is transferred to the first coil 301 of the hot water tank 3 via the water source heat pump secondary circulation pump 8, the fifth electric two-way valve 1205, and the sixth electric two-way valve 1206, and the water temperature is heated to 55℃ before the system stops;

[0058] If the air conditioning load is large, the first and second electric two-way valves 1201, 1202 in the medium loop switching component 12 are closed, and the third and fourth electric two-way valves 1203, 1204 are open: the low-temperature return water in the air conditioning water tank 4 enters the evaporator 101 via the third and fourth electric two-way valves 1203, 1204, the water source heat pump unit 1 absorbs the heat and transfers it to the hot water tank 3, realizing "waste heat recovery and hot water preparation";

[0059] Air conditioning refrigeration guarantee:

[0060] When the water temperature in the air conditioning water tank 4 is greater than 12℃, the air-cooled heat pump unit 5 and the air-cooled heat pump primary circulation pump 9 are started: the air-cooled heat pump unit 5 absorbs cold energy from the air, which is transferred to the second coil 401 of the air conditioning water tank 4 via the medium, reducing the water temperature; at the same time, the air conditioning circulation pump 10 is started to transport the low-temperature water to the external air conditioning terminal, completing the refrigeration;

[0061] Photovoltaic power generation:

[0062] The silicon cell 203 of the PV / T component 2 continuously generates electricity, which is converted into alternating current by the photovoltaic inverter 6 and fed into the power grid.

[0063] Transition season mode: only the PV / T component 2 is used to prepare hot water, reducing energy consumption;

[0064] Valve state: the first stop valve 1301, the second stop valve 1302, the third stop valve 1303 and the fourth stop valve 1304 of the stop component 13 are closed; the fifth electric two-way valve 1205 and the sixth electric two-way valve 1206 of the medium loop switching component 12 are opened, and the first electric two-way valve 1201 and the second electric two-way valve 1202 are opened, and the third electric two-way valve 1203 and the fourth electric two-way valve 1204 are closed;

[0065] Operation flow:

[0066] When the water temperature of the domestic hot water tank 3 is less than 50℃, the water source heat pump unit 1, the water source heat pump primary circulation pump 7 and the water source heat pump secondary circulation pump 8 are started;

[0067] The heat absorbed by the heat exchange plate 205 of the PV / T component 2 is transmitted to the evaporator 101 through the heat conduction medium and the water source heat pump primary circulation pump 7, and the water source heat pump unit 1 transmits the heat to the condenser 102, and then the water source heat pump secondary circulation pump 8, the fifth electric two-way valve 1205 and the sixth electric two-way valve 1206 are used to heat the domestic hot water tank 3 to 55℃, and then the system is stopped;

[0068] The photovoltaic power generation is carried out synchronously, and the power grid is continuously supplied with power.

[0069] Winter heating mode: priority is given to domestic hot water, and then air conditioning heating is met, and the heat of the PV / T component 2 is fully utilized;

[0070] Valve state: the first stop valve 1301 and the second stop valve 1302 of the stop component 13 are closed, and the third stop valve 1303 and the fourth stop valve 1304 are opened;

[0071] Domestic hot water priority operation:

[0072] When the water temperature of the domestic hot water tank 3 is less than 50℃, the water source heat pump unit 1, the water source heat pump primary circulation pump 7 and the water source heat pump secondary circulation pump 8 are started; the first electric two-way valve 1201, the second electric two-way valve 1202, the fifth electric two-way valve 1205 and the sixth electric two-way valve 1206 of the medium loop switching component 12 are opened, and the third electric two-way valve 1203 and the fourth electric two-way valve 1204 are closed;

[0073] The heat absorbed by the heat exchange plate 205 of the PV / T component 2 is transmitted to the evaporator 101 through the heat conduction medium, and the water source heat pump unit 1 transmits the heat to the condenser 102, and then the fifth electric two-way valve 1205 and the sixth electric two-way valve 1206 are used to heat the domestic hot water tank 3 to 55℃.

[0074] Air conditioning heating operation:

[0075] When the water temperature of the domestic hot water tank 3 is ≥55℃ and the water temperature of the air conditioning water tank 4 is <40℃, the medium circuit switching assembly 12 switches: the fifth electric two-way valve 1205 and the sixth electric two-way valve 1206 are closed, and the first electric two-way valve 1201, the second electric two-way valve 1202, the third electric two-way valve 1203, and the fourth electric two-way valve 1204 are opened;

[0076] The water source heat pump unit 1 continuously absorbs the heat of the PV / T assembly 2, which is transmitted to the second coil 401 of the air conditioning water tank 4 through the condenser 102, the water source heat pump secondary circulation pump 8, the third electric two-way valve 1203, and the fourth electric two-way valve 1204, and the water temperature is heated to 40℃; the air conditioning circulation pump 10 is started to deliver hot water to the external air conditioning terminal to complete heating;

[0077] If the heat of the PV / T assembly 2 is insufficient, the air-cooled heat pump unit 5 starts auxiliary heating;

[0078] Photovoltaic power generation:

[0079] Under the condition of winter light, the silicon cell sheet 203 continuously generates electricity, which is merged into the power grid through the photovoltaic inverter 6.

[0080] Although embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A circulating solar photovoltaic thermal heat pump quadruple power generation system, characterized by: It includes a water source heat pump unit (1), a PV / T component (2), a domestic hot water tank (3), an air conditioning tank (4), an air-cooled heat pump unit (5), a photovoltaic inverter (6), a water source heat pump primary circulation pump (7), a water source heat pump secondary circulation pump (8), an air-cooled heat pump primary circulation pump (9), an air conditioning circulation pump (10), a domestic hot water supply and circulation pump (11), a medium circuit switching component (12), and a cut-off component (13); The PV / T assembly (2) is connected to the water source heat pump unit (1) via a pipeline, and the water source heat pump primary circulation pump (7) is arranged on the pipeline between the PV / T assembly (2) and the water source heat pump unit (1); The domestic hot water tank (3) and the air conditioning tank (4) are respectively connected to the water source heat pump unit (1) through pipelines, and the water source heat pump secondary circulation pump (8) is arranged on the pipeline between the water source heat pump unit (1) and the domestic hot water tank (3) and the air conditioning tank (4); The air-cooled heat pump unit (5) is connected to the air-conditioning water tank (4) via a pipeline, and the air-cooled heat pump primary circulation pump (9) is arranged on the pipeline between the air-cooled heat pump unit (5) and the air-conditioning water tank (4); The air conditioning circulation pump (10) is arranged on the pipeline between the air conditioning water tank (4) and the external air conditioning terminal; The domestic hot water supply and circulation pump (11) is arranged on the water outlet pipe of the domestic hot water tank (3); The photovoltaic inverter (6) is electrically connected to the PV / T assembly (2); The medium circuit switching component (12) is arranged on a pipeline connecting the PV / T component (2), the air conditioning water tank (4) and the water source heat pump unit (1); The cut-off component (13) is arranged on a pipeline for switching between the cooling season and the heating season.

2. A circulating solar photovoltaic thermal heat pump quadruple supply system according to claim 1, characterized in that: The PV / T assembly (2) comprises a photovoltaic power generation module and a heat exchange plate (205), wherein the photovoltaic power generation module is fixedly connected to the heat exchange plate (205), and a channel for circulating a heat conducting medium is formed inside the heat exchange plate (205).

3. The circulating solar photovoltaic thermal heat pump quadruple supply system according to claim 2, characterized in that: The heat-conducting medium in the heat exchange plate (205) is ethylene glycol solution.

4. The circulating solar photovoltaic thermal heat pump quadruple power generation system according to claim 1, characterized in that: An evaporator (101) and a condenser (102) are provided in the water source heat pump unit (1), and a heat conducting medium flows inside the evaporator (101) and the condenser (102).

5. The circulating solar photovoltaic thermal heat pump quadruple power generation system according to claim 1, characterized in that: A first coil (301) is provided inside the domestic hot water tank (3), and a second coil (401) is provided inside the air-conditioning tank (4).

6. The circulating solar photovoltaic thermal heat pump quadruple power generation system according to claim 1, characterized in that: The medium circuit switching component (12) comprises a first electric two-way valve (1201), a second electric two-way valve (1202), a third electric two-way valve (1203), a fourth electric two-way valve (1204), a fifth electric two-way valve (1205), and a sixth electric two-way valve (1206), wherein the first electric two-way valve (1201) and the second electric two-way valve (1202) are arranged on a pipeline connecting the PV / T component (2) and the water source heat pump unit (1), the third electric two-way valve (1203) and the fourth electric two-way valve (1204) are arranged on a pipeline connecting the air conditioning water tank (4) and the water source heat pump unit (1), and the fifth electric two-way valve (1205) and the sixth electric two-way valve (1206) are arranged on a pipeline connecting the domestic hot water tank (3) and the water source heat pump unit (1).

7. The circulating solar photovoltaic thermal heat pump quadruple power generation system according to claim 1, characterized in that: The stop assembly (13) comprises a first stop valve (1301), a second stop valve (1302), a third stop valve (1303), and a fourth stop valve (1304), wherein the first stop valve (1301) and the second stop valve (1302) are arranged on a pipeline operating in the cooling season, and the third stop valve (1303) and the fourth stop valve (1304) are arranged on a pipeline operating in the heating season.

8. The circulating solar photovoltaic thermal heat pump quadruple power generation system according to claim 1, characterized in that: The photovoltaic inverter (6) is electrically connected to an external power grid.

9. The circulating solar photovoltaic thermal heat pump quadruple power generation system according to claim 1, characterized in that: The domestic hot water tank (3) is connected to an external domestic water pipeline.

10. The circulating solar photovoltaic thermal heat pump quadruple power generation system according to claim 1, characterized in that: The photovoltaic power generation module of the PV / T assembly (2) comprises a TPT backboard (201), an EVA film (202), a silicon cell sheet (203) and a glass plate (204); the TPT backboard (201) is fixedly connected to a heat exchange plate (205); a plurality of silicon cell sheets (203) are provided and arranged inside the EVA film (202); and the glass plate (204) is arranged outside the EVA film (202).

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