Energy storage and discharge system for photoelectric and photothermal multifunctional all-in-one machine

Abstract

The application relates to the technical field of comprehensive utilization of solar energy, and discloses an energy storage and discharge system for a photoelectric and photothermal multifunctional all-in-one machine, which comprises a mounting frame, a photoelectric and photothermal unit arranged on one side of the mounting frame, a solar tracker fixedly connected to the outer side of the mounting frame, a frame plate fixedly connected to the output end of the solar tracker, a heat absorption assembly arranged at the top of the frame plate, the heat absorption assembly comprising an insulation plate fixedly connected to the top of the frame plate, a pressure-bearing heat absorption plate core fixedly connected to the top of the insulation plate, liquid guide pipes fixedly connected to the inlet and outlet of the pressure-bearing heat absorption plate core, a heat storage unit connected to the outlet end of the pressure-bearing heat absorption plate core through the liquid guide pipes, a plurality of power generation plates fixedly connected to the top of the pressure-bearing heat absorption plate core, wires electrically connected to the current output end of the power generation plates, and a discharge unit arranged at the output end of the wires. Through electromechanical thermal integration, intelligent control and modular design, the energy storage and discharge system realizes efficient cooperation between solar power generation and heating.

Description

Technical Field

[0001] This invention relates to the field of solar energy comprehensive utilization technology, specifically to an energy storage and discharge system for a multi-functional integrated photovoltaic and photothermal machine. Background Technology

[0002] To address climate change and achieve the "dual carbon" goal is a global consensus, solar energy, as the most widely distributed, largest in reserves, and absolutely clean renewable energy source, is the core choice to replace fossil fuels.

[0003] Existing technologies mainly focus on split-type photovoltaic and solar thermal systems, and their limitations are as follows:

[0004] First, traditional photovoltaic systems focus solely on power generation, and their photoelectric conversion efficiency is highly dependent on ambient temperature. In high-temperature environments (such as summer), the temperature of photovoltaic modules rises, leading to a significant decrease in efficiency (typically by 10%-15%) and unstable power generation. Furthermore, the waste heat generated during power generation is not effectively recovered, which exacerbates module overheating and further reduces efficiency. This waste of thermal energy not only reduces energy utilization but also shortens equipment lifespan.

[0005] Secondly, traditional solar thermal systems only have the function of hot water preparation and cannot generate electricity. This results in a single energy output, which is difficult to meet users' diversified needs for electricity and hot water. Solar thermal systems rely on direct heating by solar radiation, and their efficiency drops sharply on cloudy or rainy days or under low light conditions. Moreover, there is no means of supplementing electricity, so they need to rely on external energy (such as the power grid or gas), which increases operating costs.

[0006] Third, photovoltaic and solar thermal systems usually need to be installed separately, which leads to repeated investment in equipment (such as brackets, pipes, and control systems), increasing installation costs. At the same time, the split design occupies a lot of space and is difficult to deploy in space-constrained residential or commercial settings. The split system requires independent maintenance, such as cleaning the photovoltaic modules and antifreeze treatment of the solar thermal system, which increases labor costs and failure risks.

[0007] In view of this, the present invention proposes an energy storage and discharge system for a multifunctional integrated optoelectronic and photothermal machine. Summary of the Invention

[0008] This invention proposes an energy storage and discharge system for a multifunctional integrated photovoltaic and solar thermal system, which solves the problem of low power generation efficiency in existing split-type photovoltaic and solar thermal systems.

[0009] The technical solution of the present invention is as follows: A photoelectric and photothermal multifunctional integrated machine for energy storage and discharge includes a mounting frame. A photoelectric and photothermal unit is arranged on one side of the mounting frame. The photoelectric and photothermal unit includes a solar tracker fixedly connected to the outside of the mounting frame. The output end of the solar tracker is fixedly connected to a frame plate. A heat-absorbing component is arranged on the top of the frame plate. The heat-absorbing component includes a heat-insulating plate fixedly connected to the top of the frame plate. A pressure-bearing heat-absorbing plate core is fixedly connected to the top of the heat-insulating plate. Liquid guide pipes are fixedly connected to the inlet and outlet of the pressure-bearing heat-absorbing plate core. A heat storage unit is connected to the outlet end of the pressure-bearing heat-absorbing plate core through the liquid guide pipe. A plurality of arrayed power generation plates are fixedly connected to the top of the pressure-bearing heat-absorbing plate core. A wire is electrically connected to the current output end of the power generation plate. A discharge unit is arranged at the output end of the wire.

[0010] The pressure-bearing heat-absorbing plate core includes a reflector plate, an ohmic pressure plate is glued to the top of the reflector plate, a heat-absorbing plate is welded to the top of the ohmic pressure plate, and a flow channel for the flow of heat exchange medium is provided on the inner side of the arc-shaped end of the ohmic pressure plate. The inlet and outlet of the flow channel are respectively connected to two liquid guide pipes.

[0011] Preferably, the flow channel includes a main flow channel and a branch flow channel, which are connected by welding. The weld between the main flow channel and the branch flow channel is a Z-shaped bend structure to shorten the distance between the flow channel (2324) and the heat absorber plate (2323) and enhance the heat exchange effect.

[0012] Preferably, the power generation panel is a composite structure combining ultra-clear glass and a power generation film, with the ultra-clear glass serving as the outer layer and the power generation film serving as the inner layer.

[0013] Preferably, the heat storage unit includes a hot water storage tank fixedly connected to the top of the mounting frame. A cold water inlet pipe is fixedly connected to one end of the bottom of the hot water storage tank, and a hot water outlet pipe is fixedly connected to the other end of the bottom of the hot water storage tank. A heat exchange inner tank is fixedly connected to the bottom wall inside the hot water storage tank. A piston-type three-way injection valve is fixedly connected to the inlet end of the heat exchange inner tank. One inlet of the piston-type three-way injection valve is connected to a liquid guide pipe at the inlet end of the flow channel. The other inlet of the piston-type three-way injection valve is connected to a replenishment tank for storing the heat exchange medium through a conduit. A safety valve is fixedly connected to the outside of the replenishment tank.

[0014] Preferably, the piston-type three-way injection valve is an automatic control valve or a mechanical control valve: when the system detects insufficient heat exchange medium or abnormal pressure, it automatically switches or mechanically switches to one inlet of the replenishment tank to form a passage with the liquid guide pipe; otherwise, it maintains connection with the flow channel.

[0015] Preferably, an exhaust pipe is fixedly connected to one end of the inner side of the heat exchange liner, the top end of the exhaust pipe is located at the highest point inside the heat exchange liner, and the bottom end of the exhaust pipe is inserted into the bottom of the replenishment tank.

[0016] The gas discharged from the exhaust pipe is mainly air and heat exchange medium vapor. The gas is condensed and recovered at the bottom of the replenishment tank, and no secondary treatment is required.

[0017] Preferably, an electric heating element is fixedly connected to one end of the inner side of the hot water storage tank, and a temperature sensor for detecting water temperature is fixedly connected inside the hot water storage tank. The temperature sensor is connected to the system via a signal and presets a low temperature threshold and a high temperature threshold. When the water temperature is lower than the low temperature threshold, the system controls the electric heating element to start. When the water temperature is higher than the high temperature threshold, the system cuts off the power and alarms.

[0018] Preferably, the discharge unit includes a controller, which is electrically connected to the generator board via a wire. The output terminal of the controller is electrically connected to a battery, and the output terminal of the battery is electrically connected to a bidirectional converter module. The bidirectional converter module is signal-connected to the controller, and the output terminal of the bidirectional converter module is connected to the power grid via an inverter and electrically connected to an electric heating element, respectively. The temperature sensor is signal-connected to the controller.

[0019] The temperature sensor and controller work together to control the start and stop of the heating element: when the water temperature is below the threshold, the controller controls the heating element to start; when the temperature exceeds the threshold, the controller controls the power supply to the heating element to be cut off.

[0020] The controller is used to distribute electrical energy according to the power generation of the power generation plate and the power demand of the heating element: when the heating element is started, it is given priority to supply power and the remaining power is stored in the battery or connected to the power grid.

[0021] Preferably, the battery is a lithium iron phosphate battery; the inverter is a string inverter that conforms to the GB / T37408-2019 grid connection standard.

[0022] The bidirectional converter module has DC / AC and DC / DC conversion functions and supports two working modes: grid-connected and off-grid. In off-grid mode, it converts the DC power from the battery into AC power to supply power to the load; in grid-connected mode, it can invert excess power into AC power that meets the grid requirements and send it into the grid.

[0023] The working principle and beneficial effects of this invention are as follows:

[0024] 1. The system adopts a composite structure of a power generation panel and a pressure-bearing heat-absorbing core. The power generation panel (combining ultra-clear glass and a power-generating film) directly absorbs solar energy to generate electricity, while the pressure-bearing heat-absorbing core absorbs waste heat to heat the heat exchange medium, avoiding the efficiency degradation problem caused by high temperatures in traditional photovoltaic systems. The flow channel design of the pressure-bearing heat-absorbing core adopts a Z-shaped bending structure (welded at the main flow channel and branch flow channels), reducing the distance between the heat-absorbing panel and the flow channel, breaking the thermal boundary layer, and enhancing heat exchange. The reflector reduces heat loss and ensures efficient synergy between power generation and heating processes. This design significantly improves the overall energy utilization rate, stabilizes the photoelectric conversion efficiency, and achieves high photothermal heating efficiency, making it particularly suitable for high-irradiance environments. Its overall energy efficiency is superior to that of a split system.

[0025] 2. The system is based on a mounting frame and integrates photovoltaic and photothermal units, thermal storage units, and discharge units into one unit. The solar tracking function is achieved by adjusting the angle of the frame plate through a solar tracker, which reduces the investment in repeated brackets and pipelines. This design greatly reduces the overall installation space and is suitable for space-constrained scenarios such as residential and commercial spaces. Maintenance costs are reduced, and there is no need to handle photovoltaic cleaning and photothermal antifreeze separately, thus reducing the risk of failure.

[0026] 3. The discharge unit integrates a controller, battery, and bidirectional converter module, supporting both off-grid (powering the load) and grid-connected (inverting AC power to the grid) operating modes. It intelligently adjusts energy distribution based on temperature sensor data. When the water temperature in the hot water storage tank is lower than the set value, the controller automatically activates the electric heating element for auxiliary heating. The bidirectional converter module has DC / AC and DC / DC conversion functions to ensure efficient use of electrical energy. On cloudy or rainy days or under low light conditions, the system uses battery energy storage and electric heating element supplementary heating to ensure stable hot water and power supply, compensating for the intermittent nature of solar energy. In grid-connected mode, excess electricity can be sold to increase revenue. Off-grid mode reduces dependence on the external power grid, making it suitable for remote areas or emergency scenarios.

[0027] 4. The heat storage unit adopts a "tank-within-a-tank" structure (the heat exchange inner tank is placed inside the hot water storage tank), integrating a piston-type three-way injection valve, a replenishment tank, and an exhaust pipe to achieve automatic replenishment and venting; the top of the exhaust pipe is located at the highest point of the heat exchange inner tank, and the bottom is inserted into the bottom of the replenishment tank, automatically venting gas and balancing pressure; the safety valve also serves as a replenishment port, simplifying maintenance operations; this design avoids system failures due to abnormal pressure or gas accumulation, and the safety valve automatically releases pressure to prevent explosions; leakage detection is intuitive (through changes in the liquid level in the replenishment tank), requiring no frequent manual intervention and reducing operation and maintenance costs. Attached Figure Description

[0028] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0029] Figure 1 This is a schematic diagram of the structure of an energy storage and discharge system for a photoelectric and photothermal multifunctional integrated machine according to the present invention;

[0030] Figure 2 This is a schematic diagram of the structure of the photoelectric and photothermal unit of the present invention;

[0031] Figure 3 This is a schematic diagram of the structure of the heat-absorbing component of the present invention;

[0032] Figure 4 for Figure 3 Sectional view at point AA;

[0033] Figure 5 This is a schematic diagram of the flow channel structure of the present invention;

[0034] Figure 6 This is a schematic diagram of the thermal storage unit of the present invention;

[0035] Figure 7 This is a schematic diagram of the internal structure of the heat exchange liner of the present invention;

[0036] Figure 8 This is a system block diagram of the discharge unit of the present invention.

[0037] In the diagram: 1. Mounting frame; 2. Photovoltaic and photothermal unit; 21. Solar tracker; 22. Frame plate; 23. Heat absorption component; 231. Insulation board; 232. Pressure-bearing heat absorption core; 2321. Reflector plate; 2322. Ohmic pressure plate; 2323. Heat absorption plate; 2324. Flow channel; 2324a. Main flow channel; 2324b. Branch flow channel; 233. Liquid guide pipe; 24. Power generation plate; 25. Guide pipe 1. Wire; 26. Take-up assembly; 261. First gear; 262. Shaft; 263. Second gear; 264. Winding reel; 3. Heat storage unit; 31. Hot water storage tank; 32. Cold water inlet pipe; 33. Hot water outlet pipe; 34. Heat exchange inner tank; 35. Piston-type three-way liquid injection valve; 36. Liquid replenishment tank; 37. Safety valve; 38. Heating element; 39. Exhaust pipe; 30. Temperature sensor; 4. Discharge unit. Detailed Implementation

[0038] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0039] like Figures 1 to 8As shown, this embodiment proposes an energy storage and discharge system for a multifunctional integrated photovoltaic and photothermal generator, including a mounting frame 1. A photovoltaic and photothermal unit 2 is disposed on one side of the mounting frame 1. The photovoltaic and photothermal unit 2 includes a solar tracker 21 fixedly connected to the outside of the mounting frame 1. A frame plate 22 is fixedly connected to the output end of the solar tracker 21. A heat absorption component 23 is disposed on the top of the frame plate 22. The heat absorption component 23 includes an insulation board 231 fixedly connected to the top of the frame plate 22. A pressure-bearing heat absorption plate is fixedly connected to the top of the insulation board 231. The inlet and outlet of the pressure-bearing heat-absorbing plate core 232 are fixedly connected to liquid guide pipes 233. The outlet end of the pressure-bearing heat-absorbing plate core 232 is connected to the heat storage unit 3 through the liquid guide pipe 233. Several arrayed power generation plates 24 are fixedly connected to the top of the pressure-bearing heat-absorbing plate core 232. The power generation plate 24 is a composite structure combining ultra-white glass and double-layer power generation film, with ultra-white glass as the surface layer and double-layer power generation film as the inner layer. The current output end of the power generation plate 24 is electrically connected to the wire 25, and the output end of the wire 25 is equipped with a discharge unit 4.

[0040] In this embodiment, the system uses the mounting frame 1 as the basic support structure. The photoelectric and photothermal unit 2 is rotatably connected to the top of the mounting frame through the frame plate 22, and the angle is automatically adjusted by the solar tracker 21. When sunlight shines on the power generation plate 24, its power generation film converts light energy into electrical energy, which is transmitted to the discharge unit 4 through the wire 25. At the same time, the pressure-bearing heat-absorbing plate core 232 absorbs waste heat. The heat exchange medium (such as antifreeze) in the pressure-bearing heat-absorbing plate core 232 is circulated to the heat storage unit 3 through the liquid guide pipe 233 for heat exchange to produce hot water. The whole system integrates power generation and heating functions into a single device, reducing space occupation and lowering costs.

[0041] In a further preferred embodiment of the present invention, the pressure-bearing heat-absorbing plate core 232 includes a reflector plate 2321, an ohmic pressure plate 2322 is glued to the top of the reflector plate 2321, and a heat-absorbing plate 2323 is welded to the top of the ohmic pressure plate 2322. The pressure resistance rating of this design is 0.6-1.0MPa, the working temperature range is -30℃ to 200℃, and it is suitable for various climatic conditions.

[0042] The ohmic pressure plate 2322 and the heat absorber plate 2323 are sealed by welding to form a flow channel 2324 for the flow of heat exchange medium. The inlet and outlet of the flow channel 2324 are connected to two liquid guide pipes 233 respectively. The flow channel 2324 includes a main flow channel 2324a and a branch flow channel 2324b. The main flow channel 2324a and the branch flow channel 2324b are connected by welding. The welding joint of the main flow channel 2324a and the branch flow channel 2324b has a Z-shaped bending structure to shorten the distance between the flow channel 2324 and the heat absorber plate 2323 and enhance the heat exchange effect.

[0043] In this embodiment, the pressure-bearing heat-absorbing plate core 232 adopts a multi-layer composite structure:

[0044] The reflector 2321 is located at the bottom and reflects the transmitted light back to the flow channel 2324. The ohmic pressure plate 2322 and the heat absorber 2323 are fixed by welding to form a sealed flow channel 2324. After the solar heat is absorbed by the heat absorber, it heats the heat exchange medium in the flow channel 2324. The flow channel 2324 adopts a Z-shaped bending design, which reduces the distance between the heat absorber and the flow channel. When the heat exchange medium flows through, turbulence is generated at the Z-shaped bend, which breaks the boundary layer and enhances heat exchange. The medium is evenly distributed in the branch channel 2324b to avoid local overheating or cooling. After being heated, the heat exchange medium circulates naturally (heat rises and cools down) or is forced to circulate (engineering scenario) and is transported to the heat storage unit 3 through the liquid guide pipe 233. The Z-shaped bending structure of the flow channel 2324 greatly improves the heat exchange efficiency, and the reflector 2321 reduces heat loss, realizing the synergy of "light-electricity-heat". The overall efficiency is better than that of the large split system.

[0045] In a further preferred embodiment of the present invention, the heat storage unit 3 includes a hot water storage tank 31 fixedly connected to the top of the mounting frame 1. A cold water inlet pipe 32 is fixedly connected to one end of the bottom of the hot water storage tank 31, and a hot water outlet pipe 33 is fixedly connected to the other end of the bottom of the hot water storage tank 31. A heat exchange inner tank 34 is fixedly connected to the bottom wall inside the hot water storage tank 31. A piston-type three-way injection valve 35 is fixedly connected to the inlet end of the heat exchange inner tank 34. One inlet of the piston-type three-way injection valve 35 is connected to the liquid guide pipe 233 at the inlet end of the flow channel 2324. The other inlet of the piston-type three-way injection valve 35 is connected to a replenishment tank 36 for storing heat exchange medium through a conduit. The piston-type three-way injection valve 35 is an automatic control valve or a mechanical control valve: when the system detects insufficient heat exchange medium or abnormal pressure, it automatically switches or mechanically switches to one inlet of the replenishment tank 36 to form a passage with the liquid guide pipe 233; otherwise, it maintains connection with the flow channel 2324.

[0046] A safety valve 37 is fixedly connected to the outside of the replenishment tank 36, and an exhaust pipe 39 is fixedly connected to one end of the inner side of the heat exchange inner liner 34. The top end of the exhaust pipe 39 is located at the highest point inside the heat exchange inner liner 34, and the bottom end of the exhaust pipe 39 is inserted into the bottom of the replenishment tank 36. The gas discharged from the exhaust pipe 39 is mainly air and heat exchange medium vapor. The gas is condensed and recovered at the bottom of the replenishment tank 36 to avoid accumulation, and no secondary treatment is required.

[0047] In this embodiment, the hot water storage tank 31 of the heat storage unit 3 adopts a "tank-within-a-tank" structure:

[0048] The heat exchange inner tank 34 is placed inside the hot water storage tank 31. The injection of heat exchange medium is controlled by the piston-type three-way injection valve 35. One end of the exhaust pipe 39 is located at the highest point of the heat exchange inner tank 34, and the other end is inserted into the bottom of the replenishment tank 36. When the system is running, the gas generated by the heat exchange medium is heated and accumulates at the top of the heat exchange inner tank 34, and is discharged into the replenishment tank 36 through the exhaust pipe 39. When the system cools down and generates negative pressure, the piston-type three-way injection valve 35 automatically switches to one inlet of the replenishment tank 36 to form a passage with the liquid guide pipe 233, so that the heat exchange medium inside the replenishment tank 36 is automatically replenished. This design makes the venting and replenishment functions inside the heat exchange inner tank 34 do not require manual intervention, ensuring continuous and efficient operation of the system and reducing maintenance costs.

[0049] Safety valve 37 balances pressure and also serves as a liquid replenishment port: When the gas pressure in the liquid replenishment tank 36 exceeds the set value, safety valve 37 automatically opens to release gas; when the system generates negative pressure (such as a sudden drop in temperature), safety valve 37 opens to draw in air to balance the pressure in the liquid replenishment tank 36; at the same time, the safety valve can also serve as a liquid replenishment port. When the system is naturally short of liquid, the heat exchange medium can be directly injected by unscrewing safety valve 37, and the heat exchange medium is automatically drawn into the heat exchange inner tank 34 through the pipeline.

[0050] This design enables rapid leak detection:

[0051] If a leak occurs in the heat exchange pipeline, the medium in the automatic replenishment tank will continuously replenish the pipeline, causing the liquid level in the tank to drop. The leak can be visually determined through the liquid level observation window.

[0052] If the heat exchange inner tank 34 leaks, the cold water in the hot water storage tank 31 will seep into the heat exchange inner tank 34 (or the medium in the heat exchange inner tank 34 will seep into the hot water storage tank 31), causing the liquid level in the replenishment tank 36 to rise abnormally (when cold water seeps in) or the water quality in the hot water storage tank 31 to change (when the medium seeps in), thus enabling rapid troubleshooting of leakage faults.

[0053] In a further preferred embodiment of the present invention, an electric heating element 38 is fixedly connected to one end of the inner side of the hot water storage tank 31, and a temperature sensor 30 for detecting water temperature is fixedly connected inside the hot water storage tank 31. The temperature sensor 30 is connected to the system via a signal and a preset low temperature threshold is set. When the water temperature is lower than the low temperature threshold, the system controls the electric heating element 38 to start. When the water temperature is higher than the high temperature threshold, the system cuts off the power and alarms.

[0054] In this embodiment, the temperature sensor 30 detects the water temperature inside the hot water storage tank 31 in real time. When the water temperature inside the hot water storage tank 31 is lower than the set value and the light intensity is insufficient, the electric heating tube 38 is activated to assist in heating the water inside the hot water storage tank 31 until the set value is reached, thereby ensuring a stable supply of hot water.

[0055] In a further preferred embodiment of the present invention, the discharge unit 4 includes a controller, which is electrically connected to the generator board 24 via a wire 25. The output terminal of the controller is electrically connected to a battery, which is a lithium iron phosphate battery. The output terminal of the battery is electrically connected to a bidirectional converter module, which is signal-connected to the controller. The output terminal of the bidirectional converter module is connected to the power grid via an inverter and electrically connected to the heating element 38. The inverter is a string inverter that conforms to the GB / T 37408-2019 grid connection standard. The temperature sensor 30 is signal-connected to the controller, and the temperature sensor 30 and the controller work together to control the start and stop of the heating element 38: when the water temperature is below the threshold, the controller controls the heating element 38 to start; when the temperature exceeds the threshold, the controller controls the power supply of the heating element 38 to be cut off.

[0056] The controller is used to distribute electrical energy according to the power generation of the power generation plate 24 and the power demand of the heating tube 38: when the heating tube 38 is started, it is given priority to supply power and the remaining power is stored in the battery or connected to the power grid.

[0057] The bidirectional converter module has DC / AC and DC / DC conversion functions and supports two working modes: grid-connected and off-grid. In off-grid mode, it converts the DC power from the battery into AC power to supply power to the load; in grid-connected mode, it can invert excess power into AC power that meets the grid requirements and send it into the grid.

[0058] In this embodiment, the intelligent energy management implemented by the discharge unit 4 is specifically implemented as follows:

[0059] The controller receives electrical energy from the generator board 24 via wire 25 and adjusts the energy distribution according to the data from the temperature sensor 30. The battery (lithium iron phosphate battery) stores electrical energy. The bidirectional converter module supports off-grid mode (powering the load) and grid-connected mode (excess electrical energy is inverted into AC power and fed into the grid): when the water temperature in the tank is lower than the set value, the controller starts the electric heating tube 38 for auxiliary heating; when the water temperature in the tank is higher than the set value, the controller cuts off the power to the electric heating tube 38.

[0060] This design enables intelligent power distribution, greatly improving power generation efficiency. The grid-connected mode increases economic benefits, and the off-grid / grid-connected mode can be flexibly switched to adapt to residential, commercial and other scenarios. Auxiliary heating ensures a stable hot water supply and makes up for insufficient solar energy.

[0061] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An energy storage and discharge system for a multifunctional integrated optoelectronic and photothermal machine, characterized in that, include Mounting bracket (1); A photoelectric and photothermal unit (2) is provided on one side of the mounting frame (1). The photoelectric and photothermal unit (2) includes a solar tracker (21) fixedly connected to the outside of the mounting frame (1). The output end of the solar tracker (21) is fixedly connected to a frame plate (22). A heat-absorbing assembly (23) is disposed on the top of the frame plate (22). The heat-absorbing assembly (23) includes an insulation plate (231) fixedly connected to the top of the frame plate (22). A pressure-bearing heat-absorbing plate core (232) is fixedly connected to the top of the insulation plate (231). Liquid guide pipes (233) are fixedly connected to the inlet and outlet of the pressure-bearing heat-absorbing plate core (232). The pressure-bearing heat-absorbing plate core (232) includes a reflector plate (2321). An ohmic pressure plate (2323) is glued to the top of the reflector plate (2321). 22), the top of the ohmic pressure plate (2322) is welded with a heat absorption plate (2323), and the inner side of the arc-shaped end of the ohmic pressure plate (2322) is provided with a flow channel (2324) for the flow of heat exchange medium. The inlet and outlet of the flow channel (2324) are respectively connected to two liquid guide pipes (233). The flow channel (2324) includes a main channel (2324a) and a branch channel (2324b). The main channel (2324a) and the branch channel (2324b) are connected by welding. A plurality of power generation plates (24) are arranged in an array on the top of the pressure-bearing heat-absorbing plate core (232). The plurality of power generation plates (24) are fixedly connected to the pressure-bearing heat-absorbing plate core (232). The current output terminals of the power generation plates (24) are electrically connected to wires (25). The heat storage unit (3) is connected to the outlet end of the pressure-bearing heat-absorbing plate core (232) via the liquid guide pipe (233). The heat storage unit (3) includes a hot water storage tank (31) fixedly connected to the top of the mounting frame (1). A cold water inlet pipe (32) is fixedly connected to one end of the bottom of the hot water storage tank (31), and a hot water outlet pipe (33) is fixedly connected to the other end of the bottom of the hot water storage tank (31). A heat exchange inner tank (34) is fixedly connected to the bottom wall inside the hot water storage tank (31). A piston-type three-way liquid injection valve (35) is fixedly connected to the inlet end of the heat exchange inner tank (34). One inlet of the piston-type three-way liquid injection valve (35) is connected to the liquid guide pipe (233) at the inlet end of the flow channel (2324). The other inlet of the piston-type three-way liquid injection valve (35) is connected to a replenishment tank (36) for storing heat exchange medium via a conduit. A safety valve (37) is fixedly connected to the outside of the replenishment tank (36). An electric heating tube (38) is fixedly connected to one end of the inner side of the hot water storage tank (31). A temperature sensor (30) for detecting water temperature is fixedly connected inside the hot water storage tank (31). The temperature sensor (30) is connected to the system through a signal. A low temperature threshold and a high temperature threshold are preset. When the water temperature is lower than the low temperature threshold, the system controls the electric heating tube (38) to start. When the water temperature is higher than the high temperature threshold, the system cuts off the power and alarms. The discharge unit (4) is set at the output end of the conductor (25). The discharge unit (4) includes a controller. The controller is electrically connected to the generator board (24) through the conductor (25). The output end of the controller is electrically connected to a storage battery. The output end of the storage battery is electrically connected to a bidirectional converter module. The bidirectional converter module is signal-connected to the controller. The output end of the bidirectional converter module is connected to the power grid through an inverter and electrically connected to the heating tube (38). The temperature sensor (30) is signal-connected to the controller. The temperature sensor (30) and the controller work together to control the start and stop of the heating element (38): when the water temperature is below the threshold, the controller controls the heating element (38) to start, and when the temperature exceeds the threshold, the controller controls the power supply of the heating element (38) to be cut off. The controller is used to distribute electrical energy according to the power generation of the power generation plate (24) and the power demand of the heating tube (38): when the heating tube (38) is started, it is given priority to supply power and the remaining power is stored in the battery or connected to the power grid.

2. The energy storage and discharge system for a photoelectric and photothermal multifunctional integrated machine according to claim 1, characterized in that, The pressure-bearing heat-absorbing plate core (232) has a pressure resistance rating of 0.6-1.0MPa and an operating temperature range of -30℃ to 200℃.

3. The energy storage and discharge system for a photoelectric and photothermal multifunctional integrated machine according to claim 2, characterized in that, The welding joints of the main flow channel (2324a) and the branch flow channel (2324b) are Z-shaped bends to shorten the distance between the flow channel (2324) and the heat absorption plate (2323) and enhance the heat exchange effect.

4. The energy storage and discharge system for a photoelectric and photothermal multifunctional integrated machine according to claim 1, characterized in that, The power generation plate (24) is a composite structure combining ultra-white glass and power generation film, with ultra-white glass as the surface layer and power generation film as the inner layer.

5. The energy storage and discharge system for a photoelectric and photothermal multifunctional integrated machine according to claim 1, characterized in that, The piston-type three-way injection valve (35) is an automatic control valve or a mechanical control valve: when the system detects insufficient heat exchange medium or abnormal pressure, it automatically switches or mechanically switches to one inlet of the replenishment tank (36) to form a passage with the liquid guide pipe (233); otherwise, it remains connected to the flow channel (2324).

6. The energy storage and discharge system for a photoelectric and photothermal multifunctional integrated machine according to claim 1, characterized in that, An exhaust pipe (39) is fixedly connected to one end of the inner side of the heat exchange inner liner (34). The top end of the exhaust pipe (39) is located at the highest point inside the heat exchange inner liner (34), and the bottom end of the exhaust pipe (39) is inserted into the bottom of the replenishment tank (36). The gas discharged from the exhaust pipe (39) is mainly air and heat exchange medium vapor. The gas is condensed and recovered at the bottom of the replenishment tank (36) without secondary treatment.

7. The energy storage and discharge system for a photoelectric and photothermal multifunctional integrated machine according to claim 6, characterized in that, The battery is a lithium iron phosphate battery; the inverter is a string inverter that conforms to the GB / T37408-2019 grid connection standard. The bidirectional converter module has DC / AC and DC / DC conversion functions and supports two working modes: grid-connected and off-grid. In off-grid mode, it converts the DC power from the battery into AC power to supply power to the load; in grid-connected mode, it can invert excess power into AC power that meets the grid requirements and send it into the grid.

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