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

Abstract

The invention relates to the technical field of comprehensive utilization of solar energy, and provides an energy storage and discharge system for a photoelectric and photo-thermal multifunctional all-in-one machine, which comprises a mounting rack, a photoelectric and photo-thermal unit is arranged on one side of the mounting rack, and the photoelectric and photo-thermal unit comprises a solar tracker fixedly connected to the outer side of the mounting rack; a frame plate is fixedly connected to the output end of the solar tracker, a heat absorption assembly is arranged at the top of the frame plate and comprises a heat preservation plate fixedly connected to the top of the frame plate, a pressure-bearing heat absorption plate core is fixedly connected to the top of the heat preservation plate, and liquid guide pipes are fixedly connected to an inlet and an outlet of the pressure-bearing heat absorption plate core. The outlet end of the pressure-bearing heat absorption plate core is connected with a heat storage unit through a liquid guide pipe, the top of the pressure-bearing heat absorption plate core is fixedly connected with a plurality of power generation plates, the current output ends of the power generation plates are electrically connected with wires, and the output ends of the wires are provided with discharging units. Through electromechanical heat integration, intelligent control and modular design, efficient cooperation of solar power generation and heating is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of comprehensive utilization of solar energy, and in particular, relates to an energy storage and discharge system for a photoelectric and photothermal multifunctional all-in-one machine. BACKGROUND

[0002] It is a global consensus to respond to climate change and achieve the "double carbon" goal, and solar energy, as the most widely distributed and largest renewable energy source, is the core choice to replace fossil energy.

[0003] The existing technology mainly focuses on split-type photovoltaic and photothermal systems, which have the following limitations:

[0004] First, the traditional photovoltaic system only focuses on power generation, and the photoelectric conversion efficiency is highly dependent on the environmental temperature. In high-temperature environments (such as summer), the temperature of the photovoltaic components increases, resulting in a significant decrease in efficiency (usually by 10-15%), and the power generation is unstable. Moreover, the waste heat generated during power generation is not effectively recovered, but rather exacerbates the overheating of the components, further reducing the efficiency. This waste of heat energy not only reduces energy utilization, but also shortens the service life of the equipment.

[0005] Second, the traditional photothermal system only has the function of hot water preparation and cannot generate electricity, which leads to single energy output and makes it difficult to meet the diversified needs of users for electricity and hot water. The photothermal system relies on solar radiation for direct heating, and its efficiency drops sharply in rainy or low-light conditions. Moreover, there is no means of electricity supplement, and it needs to rely on external energy (such as the power grid or gas), increasing the operating cost.

[0006] Third, the photovoltaic system and the photothermal system usually need to be installed separately, resulting in repeated investment in equipment (such as supports, pipes, and control systems), increasing the installation cost. At the same time, the split design occupies a large amount of space, making it difficult to deploy in residential or commercial scenarios with limited space. The split system needs to be maintained independently, such as cleaning of the photovoltaic components and anti-freezing treatment of the photothermal system, increasing the labor cost and the risk of failure.

[0007] Therefore, the present application proposes an energy storage and discharge system for a photoelectric and photothermal multifunctional all-in-one machine. SUMMARY

[0008] The present application proposes an energy storage and discharge system for a photoelectric and photothermal multifunctional all-in-one machine, which solves the problem of low power generation efficiency of the split-type photovoltaic system and photothermal system in the prior art.

[0009] The technical scheme of the present application is as follows: an energy storage and discharge system for a photoelectric and photo-thermal multifunctional all-in-one machine, comprising a mounting frame, a photoelectric and photo-thermal unit arranged on one side of the mounting frame, the photoelectric and photo-thermal unit comprising a solar tracker fixedly connected to the outer side of the mounting frame, an output end of the solar tracker being fixedly connected with a frame plate, the frame plate being provided with a heat absorption assembly on the top thereof, the heat absorption assembly comprising a heat preservation plate fixedly connected to the top of the frame plate, a pressure-bearing heat absorption plate core being fixedly connected to the top of the heat preservation plate, import and export ends of the pressure-bearing heat absorption plate core being fixedly connected with liquid guide pipes, the outlet end of the pressure-bearing heat absorption plate core being connected with a heat storage unit through the liquid guide pipe, the top of the pressure-bearing heat absorption plate core being fixedly connected with a plurality of arrayed power generation plates, current output ends of the power generation plates being electrically connected with wires, and the output ends of the wires being provided with a discharge unit.

[0010] The pressure-bearing heat absorption plate core comprises a reflecting plate, the top of the reflecting plate being glued with an ohmic type pressing plate, the top of the ohmic type pressing plate being welded with a heat absorption plate, the inner side of the arc-shaped end of the ohmic type pressing plate being provided with a flow channel for circulating heat exchange medium, and the import and export ends of the flow channel being connected with the two liquid guide pipes respectively.

[0011] Preferably, the flow channel comprises a main flow channel and a branch flow channel, the main flow channel and the branch flow channel being connected through welding, and the welding positions of the main flow channel and the branch flow channel being Z-shaped bending structures to shorten the distance between the flow channel (2324) and the heat absorption plate (2323) and enhance the heat exchange effect.

[0012] Preferably, the power generation plate is a composite structure of super white glass and power generation film, the super white glass serving as a surface layer, and the power generation film serving as an inner layer.

[0013] Preferably, the heat storage unit comprises a heat storage water tank fixedly connected to the top of the mounting frame, one end of the bottom of the heat storage water tank being fixedly connected with a cold water inlet pipe, the other end of the bottom of the heat storage water tank being fixedly connected with a hot water outlet pipe, the bottom wall of the inner side of the heat storage water tank being fixedly connected with a heat exchange inner container, the import end of the heat exchange inner container being fixedly connected with a piston type three-way liquid injection valve, one inlet of the piston type three-way liquid injection valve being connected with the liquid guide pipe at the import end of the flow channel, another inlet of the piston type three-way liquid injection valve being connected with a liquid supplement tank for storing heat exchange medium through a guide pipe, and the outer side of the liquid supplement tank being fixedly connected with a safety valve.

[0014] Preferably, the piston type three-way liquid injection valve is an automatic control valve or a mechanical control valve: when the system detects that the heat exchange medium is insufficient or the pressure is abnormal, the automatic switching or mechanical switching is performed to form a passage between the one inlet of the liquid supplement tank and the liquid guide pipe, otherwise the connection with the flow channel is maintained.

[0015] Preferably, one end of the inner side of the heat exchange liner is fixedly connected with an exhaust pipe, the top end of the exhaust pipe is located at the highest position of the inner side of the heat exchange liner, and the bottom end of the exhaust pipe is inserted into the bottom of the liquid supplementing tank.

[0016] The gas discharged from the exhaust pipe is mainly air and steam of the heat exchange medium, and the gas is condensed and recovered through the bottom of the liquid supplementing tank, without the need for secondary treatment.

[0017] Preferably, one end of the inner side of the heat storage water tank is fixedly connected with an electric heating pipe, the inner side of the heat storage water tank is fixedly connected with a temperature sensor for detecting the water temperature, the temperature sensor is connected with the system through a signal, preset low temperature threshold and high temperature threshold, when the water temperature is lower than the low temperature threshold, the system controls the electric heating pipe to start, and when the water temperature is higher than the high temperature threshold, the system cuts off the power supply and alarms.

[0018] Preferably, the discharging unit comprises a controller, the controller is electrically connected with the power generation plate through a wire, the output end of the controller is electrically connected with a storage battery, the output end of the storage battery is electrically connected with a bidirectional current conversion module, the bidirectional current conversion module is signal connected with the controller, the output end of the bidirectional current conversion module is respectively connected with an inverter and the electric heating pipe, and the temperature sensor is signal connected with the controller.

[0019] The temperature sensor and the controller cooperatively control the start and stop of the electric heating pipe: when the water temperature is lower than the threshold, the controller controls the electric heating pipe to start, and when the water temperature is higher than the threshold, the controller controls the power supply of the electric heating pipe to be cut off.

[0020] The controller is used for electric energy distribution according to the power generation amount of the power generation plate and the required electric energy of the electric heating pipe: when the electric heating pipe starts, the power supply is preferentially supplied to the electric heating pipe, and the remaining electric energy is stored in the storage battery or connected with the power grid.

[0021] Preferably, the storage battery is a lithium iron phosphate battery, and the inverter is a group string type inverter, which meets the grid connection standard GB / T37408-2019.

[0022] The bidirectional current conversion module has DC / AC and DC / DC conversion functions, supports two working modes of grid connection and off-grid: in the off-grid mode, the direct current of the storage battery is converted into alternating current to supply power to the load; and in the grid connection mode, the excess electric energy can be converted into alternating current meeting the requirements of the power grid and sent into the power grid.

[0023] The working principle and beneficial effects of the application are as follows:

[0024] 1、System uses the composite structure of power generation plate and pressure absorption heat plate core, the power generation plate (ultra-white glass combined with power generation film) directly absorbs light energy to generate electricity, and at the same time the pressure absorption heat plate core absorbs residual heat to heat the heat exchange medium, avoiding the problem of efficiency reduction caused by high temperature in traditional photovoltaic systems; the flow channel design of the pressure absorption heat plate core adopts a Z-shaped bending structure (welding place of main flow channel and branch flow channel), which reduces the distance between the heat absorption plate and the flow channel, breaks the thermal boundary layer and strengthens heat exchange. The reflection plate reduces heat loss, ensuring efficient cooperation in the process of power generation and heating; this design significantly improves the comprehensive energy utilization rate, stabilizes the photoelectric conversion efficiency, and has high photo-thermal heating efficiency, especially suitable for high irradiance environments, and the overall energy efficiency is better than that of a split system.

[0025] 2、The system integrates photovoltaic and photo-thermal units, heat storage units, and discharge units based on a mounting rack, adjusts the angle of the frame plate through a solar tracker to realize solar tracking function, and reduces the investment in repeated supports and pipelines; this design greatly reduces the overall installation space, making it suitable for space-limited scenarios such as residential and commercial spaces; maintenance costs are reduced, and there is no need for independent photovoltaic cleaning and photo-thermal anti-freezing, so the risk of failure is reduced.

[0026] 3、The discharge unit integrates a controller, a battery, and a bidirectional conversion module, supporting two working modes: off-grid (powering the load) and grid-connected (inverting AC power into the grid); the controller intelligently adjusts energy distribution based on temperature sensor data; when the water temperature in the heat storage tank is below the set value, the controller automatically starts the electric heating pipe for auxiliary heating; the bidirectional conversion module has DC / AC and DC / DC conversion functions, ensuring efficient use of electrical energy; in cloudy or low-light conditions, the system uses battery storage and electric heating pipes to supplement heat, ensuring stable hot water and power supply, and compensating for the intermittent nature of solar energy; the grid-connected mode can sell excess electricity, increasing revenue; the off-grid mode reduces dependence on external power grids, making it suitable for remote areas or emergency scenarios.

[0027] 4、The heat storage unit adopts a "double inner tank" structure (the heat exchange inner tank is placed inside the heat storage tank), integrating a piston-type three-way liquid injection valve, a liquid supplement tank, and an exhaust pipe to achieve automatic liquid supplement and exhaust; the top end of the exhaust pipe is located at the highest point of the heat exchange inner tank, and the bottom end is inserted into the bottom of the liquid supplement tank, automatically exhausting gas and balancing pressure; the safety valve also serves as a liquid supplement port, simplifying maintenance operations; this design avoids system failures caused by abnormal pressure or gas accumulation, and the safety valve automatically releases pressure to prevent explosions; liquid leakage detection is intuitive (through changes in the liquid level of the liquid supplement tank), eliminating the need for frequent manual intervention and reducing operation and maintenance costs. BRIEF DESCRIPTION OF DRAWINGS

[0028] The application will be further described in detail below in conjunction with the drawings and specific embodiments.

[0029] Figure 1 A structure diagram of an energy storage and discharge system for a photovoltaic and photo-thermal multifunctional all-in-one machine according to the present application;

[0030] Figure 2 Structure diagram of photoelectric and photo-thermal unit of the present application;

[0031] Figure 3 Structure diagram of heat-absorbing component of the present application;

[0032] Figure 4 Structure diagram of Figure 3 Sectional view at A-A;

[0033] Figure 5 Structure diagram of flow channel of the present application;

[0034] Figure 6 Structure diagram of heat-storing unit of the present application;

[0035] Figure 7 Structure diagram of inner part of heat-exchanging inner container of the present application;

[0036] Figure 8 System block diagram of discharging unit of the present application.

[0037] In the figure: 1, mounting rack; 2, photoelectric and photo-thermal unit; 21, solar energy tracker; 22, frame plate; 23, heat-absorbing component; 231, heat-insulating plate; 232, pressure-bearing heat-absorbing plate core; 2321, reflecting plate; 2322, ohmic type pressing plate; 2323, heat-absorbing plate; 2324, flow channel; 2324a, main flow channel; 2324b, branch flow channel; 233, liquid guide pipe; 24, power generation plate; 25, wire; 26, wire collecting part; 261, first gear; 262, rotating shaft; 263, second gear; 264, wire winding wheel; 3, heat-storing unit; 31, heat-storing water tank; 32, cold water inlet pipe; 33, hot water outlet pipe; 34, heat-exchanging inner container; 35, piston type three-way liquid injection valve; 36, liquid supplementing tank; 37, safety valve; 38, electric heating pipe; 39, exhaust pipe; 30, temperature sensor; 4, discharging unit. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative labor are involved in the protection scope of the present application.

[0039] As Figures 1 to 8As shown, the embodiment proposes a photoelectric and photo-thermal multifunctional integrated energy storage and discharge system, which comprises a mounting frame 1, and a photoelectric and photo-thermal unit 2 arranged on one side of the mounting frame 1. The photoelectric and photo-thermal unit 2 comprises a solar tracker 21 fixedly connected to the outer side of the mounting frame 1. The output end of the solar tracker 21 is fixedly connected with a frame plate 22. The top of the frame plate 22 is provided with a heat absorption assembly 23. The heat absorption assembly 23 comprises a heat preservation plate 231 fixedly connected to the top of the frame plate 22. The top of the heat preservation plate 231 is fixedly connected with a pressure-bearing heat absorption plate core 232. The inlet and outlet of the pressure-bearing heat absorption plate core 232 are fixedly connected with liquid guide pipes 233. The outlet end of the pressure-bearing heat absorption plate core 232 is connected with a heat storage unit 3 through the liquid guide pipe 233. The top of the pressure-bearing heat absorption plate core 232 is fixedly connected with a plurality of array-distributed power generation plates 24. The power generation plate 24 is a composite structure combined with super white glass and double-layer power generation film. The super white glass serves as the surface layer, and the double-layer power generation film serves as the inner layer. The current output end of the power generation plate 24 is electrically connected with a wire 25. The output end of the wire 25 is provided with a discharge unit 4.

[0040] In the embodiment, the system takes the mounting frame 1 as the basic support structure. The photoelectric and photo-thermal unit 2 is rotatably connected to the top end of the mounting frame through the frame plate 22 and is automatically angle-adjusted by the solar tracker 21. When the sunlight irradiates the power generation plate 24, the power generation film converts the light energy into electric energy, which is transmitted to the discharge unit 4 through the wire 25. At the same time, the pressure-bearing heat absorption plate core 232 absorbs the residual heat. The heat exchange medium (such as anti-freezing fluid) in the pressure-bearing heat absorption plate core 232 is circulated to the heat storage unit 3 through the liquid guide pipe 233 to exchange heat and prepare hot water. The overall system integrates the power generation and heating functions in a single device, reducing space occupation and cost.

[0041] In the further preferred embodiment of the application, the pressure-bearing heat absorption plate core 232 comprises a reflecting plate 2321. An ohmic pressure plate 2322 is glued to the top of the reflecting plate 2321. A heat absorption plate 2323 is welded to the top of the ohmic pressure plate 2322. The design has a pressure rating of 0.6-1.0 MPa and a working temperature range of -30℃ to 200℃, and is suitable for various climate conditions.

[0042] The flow channel 2324 for circulating the heat exchange medium is formed by welding between the ohmic pressure plate 2322 and the heat absorption plate 2323. The inlet and outlet of the flow channel 2324 are respectively connected with the two liquid guide pipes 233. The flow channel 2324 comprises 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 position of the main flow channel 2324a and the branch flow channel 2324b is a Z-shaped bending structure to shorten the distance between the flow channel 2324 and the heat absorption plate 2323 and enhance the heat exchange effect.

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

[0044] The reflection plate 2321 is located at the bottom and reflects the transmitted light back to the flow channel 2324; the ohmic type pressing plate 2322 and the heat absorbing plate 2323 are fixed by welding to form a sealed flow channel 2324, and the solar heat is absorbed by the heat absorbing plate to heat the heat exchange medium in the flow channel 2324; the flow channel 2324 adopts a Z-shaped bending design, so that the distance between the heat absorbing plate and the flow channel is reduced, and when the heat exchange medium flows through, the Z-shaped bending part generates turbulent flow, breaks the boundary layer, and strengthens heat exchange; the heat exchange medium is heated and naturally circulates (heat rises and cold falls) or is forced to circulate (engineering scene), 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, the reflection plate 2321 reduces the heat energy loss, realizes the cooperation of “light-electricity-heat”, and the comprehensive efficiency is much higher than that of a separate system.

[0045] In a further preferred embodiment of the present application, the heat storage unit 3 comprises a heat storage water tank 31 fixedly connected to the top of the mounting frame 1, one end of the bottom of the heat storage water tank 31 is fixedly connected with a cold water inlet pipe 32, the other end of the bottom of the heat storage water tank 31 is fixedly connected with a hot water outlet pipe 33, the inner bottom wall of the heat storage water tank 31 is fixedly connected with a heat exchange liner 34, the inlet end of the heat exchange liner 34 is fixedly connected with a piston type three-way liquid injection valve 35, one inlet of the piston type three-way liquid injection valve 35 is connected with 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 with a liquid supplement tank 36 for storing heat exchange medium through a conduit, and the piston type three-way liquid injection valve 35 is an automatic control valve or a mechanical control valve; when the system detects that the heat exchange medium is insufficient or the pressure is abnormal, the piston type three-way liquid injection valve 35 is automatically switched or mechanically switched to form a passage between the one inlet of the liquid supplement tank 36 and the liquid guide pipe 233, otherwise the piston type three-way liquid injection valve 35 is kept connected with the flow channel 2324;

[0046] The outer side of the liquid supplement tank 36 is fixedly connected with a safety valve 37, one end of the inner side of the heat exchange liner 34 is fixedly connected with an exhaust pipe 39, the top end of the exhaust pipe 39 is located at the highest position of the inner side of the heat exchange liner 34, the bottom end of the exhaust pipe 39 is inserted into the bottom of the liquid supplement tank 36, and the gas discharged from the exhaust pipe 39 is mainly air and heat exchange medium vapor, which is condensed and recovered through the bottom of the liquid supplement tank 36 to avoid accumulation, and does not need to be treated again.

[0047] In this embodiment, the heat storage water tank 31 of the heat storage unit 3 adopts a “liner-in-liner” structure:

[0048] The heat exchange liner 34 is arranged in the heat storage water tank 31, the heat exchange medium is injected by controlling 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 liner 34, and the other end is inserted into the bottom of the liquid supplement tank 36; when the system is running, the gas generated by the heat exchange medium is gathered at the top of the heat exchange liner 34, and is discharged into the liquid supplement tank 36 through the exhaust pipe 39; when the system cools down to generate negative pressure, the piston type three-way injection valve 35 is automatically switched to form a path between one inlet of the liquid supplement tank 36 and the liquid guide pipe 233, so that the heat exchange medium in the liquid supplement tank 36 is automatically supplemented, the design makes the exhaust and liquid supplement functions in the heat exchange liner 34 without manual intervention, ensures the continuous and efficient operation of the system, and reduces the maintenance cost.

[0049] The safety valve 37 balances pressure and serves as a liquid supplement port: when the gas pressure in the liquid supplement tank 36 exceeds the set value, the safety valve 37 is automatically opened to discharge gas; when the system generates negative pressure (such as sudden temperature drop), the safety valve 37 is opened to suck in air to balance the pressure in the liquid supplement tank 36; at the same time, the safety valve can serve as a liquid supplement port, when the system naturally lacks liquid, the safety valve 37 is unscrewed to directly inject the heat exchange medium, and the heat exchange medium is automatically sucked into the heat exchange liner 34 through the pipeline.

[0050] The design can quickly detect liquid leakage:

[0051] If the heat exchange pipeline leaks, the medium in the automatic liquid supplement tank will continue to supplement the pipeline, causing the liquid level in the tank to drop, and the pipeline leakage can be directly observed through the liquid level observation window;

[0052] If the heat exchange liner 34 leaks, the cold water in the heat storage water tank 31 will seep into the heat exchange liner 34 (or the medium in the heat exchange liner 34 seeps into the heat storage water tank 31), causing the liquid level in the liquid supplement tank 36 to abnormally rise (when cold water seeps in) or the water quality of the heat storage water tank 31 to change (when medium seeps in), so that the liquid leakage fault can be quickly checked.

[0053] In a further preferred embodiment of the present application, one end of the inside of the heat storage water tank 31 is fixedly connected with an electric heating pipe 38, and a temperature sensor 30 for detecting water temperature is fixedly connected in the heat storage water tank 31, the temperature sensor 30 is connected with the system through a signal, a low temperature threshold is preset, the electric heating pipe 38 is started when the water temperature is lower than the low temperature threshold, and the power supply is cut off and an alarm is given when the water temperature is higher than a high temperature threshold.

[0054] In the embodiment, the temperature sensor 30 is used to detect the water temperature in the heat storage water tank 31 in real time, the electric heating pipe 38 is started to assist in heating the water in the heat storage water tank 31 when the water temperature in the heat storage water tank 31 is lower than the set value and the light intensity is insufficient, until the set value is reached, so that the stable supply of hot water is ensured.

[0055] The further preferred embodiment of the present application, the discharge unit 4 includes a controller, the controller is electrically connected with the power generation plate 24 through the wire 25, the output end of the controller is electrically connected with a storage battery, the storage battery is a lithium iron phosphate battery; the output end of the storage battery is electrically connected with a bidirectional current conversion module, the bidirectional current conversion module is signal connected with the controller, the output end of the bidirectional current conversion module is respectively connected with the grid through an inverter and is electrically connected with the electric heating pipe 38, the inverter is a group string type inverter, which meets the grid connection standard GB / T 37408-2019; the temperature sensor 30 is signal connected with the controller, and the temperature sensor 30 and the controller cooperatively control the start-stop of the electric heating pipe 38: when the water temperature is lower than the threshold value, the controller controls the electric heating pipe 38 to start, and when the temperature is too high, the controller controls the power supply of the electric heating pipe 38 to be cut off;

[0056] The controller is used for electric energy distribution according to the power generation amount of the power generation plate 24 and the demand electric quantity of the electric heating pipe 38: when the electric heating pipe 38 starts, the power supply is preferentially supplied and the residual power is stored in the battery or connected with the grid;

[0057] The bidirectional current conversion module has DC / AC and DC / DC conversion functions, supports two working modes of grid connection and off-grid: in the off-grid mode, the direct current of the storage battery is converted into alternating current to supply power to the load; in the grid connection mode, the excess electric energy can be inverted into alternating current meeting the requirements of the grid and sent into the grid.

[0058] In the embodiment, the intelligent energy management of the discharge unit 4 is realized, and the specific implementation process is as follows:

[0059] The controller receives the electric energy of the power generation plate 24 through the wire 25, and adjusts the energy distribution according to the data of the temperature sensor 30, the storage battery (lithium iron phosphate battery) stores the electric energy, and the bidirectional current conversion module supports the off-grid mode (power supply for the load) and the grid connection mode (excess electric energy is inverted into alternating current and sent into the grid): when the water temperature of the water tank is lower than the set value, the controller starts the electric heating pipe 38 to assist heating; when the water temperature of the water tank is higher than the set value, the controller cuts off the power supply of the electric heating pipe 38;

[0060] The design realizes intelligent distribution of electric energy, greatly improves the power generation efficiency, increases economic benefits in the grid connection mode, flexibly switches between the off-grid mode and the grid connection mode, and is suitable for residential, commercial and other scenes; auxiliary heating ensures stable hot water supply and makes up for the insufficient solar energy.

[0061] The above is only a preferred embodiment of the present application, and is not used to limit the present application, any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. An energy storage and discharge system for a photoelectric and photo-thermal multifunctional all-in-one machine, characterized in that, Comprising mounting rack (1); photoelectric photothermal unit (2) arranged on one side of the mounting rack (1), the photoelectric photothermal unit (2) comprising a solar tracker (21) fixedly connected to the outside of the mounting rack (1), the output end of the solar tracker (21) being fixedly connected with a frame plate (22); heat absorption assembly (23) arranged on the top of the frame plate (22), the heat absorption assembly (23) comprising a heat preservation plate (231) fixedly connected to the top of the frame plate (22), the top of the heat preservation plate (231) being fixedly connected with a pressure-bearing heat absorption plate core (232), the inlet and outlet of the pressure-bearing heat absorption plate core (232) being fixedly connected with liquid guide pipes (233); a plurality of power generation plates (24) arranged in an array on the top of the pressure-bearing heat absorption plate core (232), a plurality of the power generation plates (24) being fixedly connected to the pressure-bearing heat absorption plate core (232), the current output end of the power generation plate (24) being electrically connected with a wire (25); heat storage unit (3) connected to the outlet end of the pressure-bearing heat absorption plate core (232) through the liquid guide pipe (233); discharge unit (4) arranged at the output end of the wire (25).

2. The energy storage and discharge system for the photoelectric and photo-thermal multifunctional all-in-one machine according to claim 1, characterized in that, The pressure-bearing heat absorption plate core (232) has a pressure resistance grade of 0.6-1.0 MPa and a working temperature range of-30℃ to 200℃; The pressure-bearing heat absorption plate core (232) comprises a reflecting plate (2321), the top of the reflecting plate (2321) being glued with an ohmic type pressing plate (2322), the top of the ohmic type pressing plate (2322) being welded with a heat absorption plate (2323), the inner side of the arc-shaped end of the ohmic type pressing plate (2322) being provided with a flow channel (2324) for circulating heat exchange medium, the inlet and outlet of the flow channel (2324) being respectively connected with two liquid guide pipes (233).

3. The energy storage and discharge system for optoelectronic and photothermal multifunctional all-in-one machine according to claim 2, characterized in that, The flow channel (2324) comprises a main flow channel (2324a) and a branch flow channel (2324b), the main flow channel (2324a) and the branch flow channel (2324b) being connected by welding, the welding position of the main flow channel (2324a) and the branch flow channel (2324b) being a Z-shaped bending structure 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 photoelectric and photothermal multifunctional all-in-one machine according to claim 1, characterized in that, The power generation plate (24) is a composite structure of super white glass and power generation film, the super white glass serving as a surface layer and the power generation film serving as an inner layer.

5. The energy storage and discharge system for optoelectronic and photothermal multifunctional all-in-one machine according to claim 1, characterized in that, The heat storage unit (3) comprises a heat storage water tank (31) fixedly connected to the top of the mounting rack (1), one end of the bottom of the heat storage water tank (31) is fixedly connected with a cold water inlet pipe (32), the other end of the bottom of the heat storage water tank (31) is fixedly connected with a hot water outlet pipe (33), the bottom wall of the inner side of the heat storage water tank (31) is fixedly connected with a heat exchange inner container (34), the inlet end of the heat exchange inner container (34) is fixedly connected with a piston type three-way liquid injection valve (35), one inlet of the piston type three-way liquid injection valve (35) is connected with 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 with a liquid supplement tank (36) for storing heat exchange medium through a guide pipe, and the outer side of the liquid supplement tank (36) is fixedly connected with a safety valve (37).

6. The energy storage and discharge system for optoelectronic and photothermal multifunctional all-in-one machine according to claim 5, characterized in that, The piston type three-way liquid injection valve (35) is an automatic control valve or a mechanical control valve: when the system detects that the heat exchange medium is insufficient or the pressure is abnormal, the automatic switching or mechanical switching is performed to form a passage between the one inlet of the liquid supplement tank (36) and the liquid guide pipe (233), otherwise the connection with the flow channel (2324) is maintained.

7. The energy storage and discharge system for the photoelectric and photo-thermal multifunctional all-in-one machine according to claim 5, characterized in that, One end of the inner side of the heat exchange inner container (34) is fixedly connected with an exhaust pipe (39), the top end of the exhaust pipe (39) is located at the highest position in the inner side of the heat exchange inner container (34), and the bottom end of the exhaust pipe (39) is inserted into the bottom of the liquid supplement tank (36); the gas discharged from the exhaust pipe (39) is mainly air and heat exchange medium vapor, and the gas is condensed and recovered through the bottom of the liquid supplement tank (36) without the need for secondary treatment.

8. The energy storage and discharge system for optoelectronic and photothermal multifunctional all-in-one machine according to claim 7, characterized in that, One end of the inner side of the heat storage water tank (31) is fixedly connected with an electric heating pipe (38), and a temperature sensor (30) for detecting water temperature is fixedly connected in the heat storage water tank (31), the temperature sensor (30) is connected with 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 pipe (38) to start, and when the water temperature is higher than the high temperature threshold, the system cuts off the power supply and alarms.

9. The energy storage and discharge system for optoelectronic and photothermal multifunctional all-in-one machine according to claim 8, characterized in that, The discharging unit (4) comprises a controller, the controller is electrically connected with a power generation plate (24) through a wire (25), an output end of the controller is electrically connected with a storage battery, an output end of the storage battery is electrically connected with a bidirectional current conversion module, the bidirectional current conversion module is signal connected with the controller, output ends of the bidirectional current conversion module are respectively connected with an inverter and the electric heating pipe (38), and the temperature sensor (30) is signal connected with the controller. The temperature sensor (30) and the controller cooperatively control the start and stop of the electric heating pipe (38): when the water temperature is lower than the threshold, the controller controls the electric heating pipe (38) to start, and when the temperature is too high, the controller controls the power supply of the electric heating pipe (38) to be cut off. The controller is used for electric energy distribution according to the power generation amount of the power generation plate (24) and the required electric energy of the electric heating pipe (38): when the electric heating pipe (38) starts, the power supply is preferentially supplied and the remaining electricity is stored in the storage battery or connected with the power grid.

10. The energy storage and discharge system for optoelectronic and photothermal multifunctional all-in-one machine according to claim 9, characterized in that, The storage battery is a lithium iron phosphate battery, and the inverter is a group string type inverter, which meets the grid connection standard GB / T 37408-2019. The bidirectional current conversion module has DC / AC and DC / DC conversion functions, supports two working modes of grid connection and off-grid: in the off-grid mode, direct current of the storage battery is converted into alternating current to supply power to the load; in the grid connection mode, excess power can be inverted into alternating current meeting the requirements of the power grid and sent into the power grid.

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