Multi-source coupling heat supply device and method and multi-energy complementary coupling heat supply system

Abstract

The invention belongs to the field of intelligent agricultural greenhouse heat supply, and discloses a multi-source coupling heat supply device and method and a multi-energy complementary coupling heat supply system. The device comprises a heat utilization terminal, a first heat supply module, a gas-fired boiler unit, a second heat supply module and an energy storage module. In the specific use process, hot water at the stable temperature can be obtained under different environment temperature conditions, the heat supply influence caused by environment changes is reduced, and the temperature stability of a greenhouse is improved. Besides, when the first heat supply module or the gas-fired boiler unit is used for supplying hot water to the greenhouse, the temperature of cold water entering the first heat supply module or cold water or heat supply hot water entering the gas-fired boiler unit can be increased through stored hot water in the energy storage module; therefore, the heating load, the operation energy consumption and the starting energy consumption of the first heat supply module or the gas-fired boiler unit can be effectively reduced, meanwhile, the temperature rise time is shortened, the operation efficiency of the first heat supply module or the gas-fired boiler unit is improved, the service life of the first heat supply module or the gas-fired boiler unit is prolonged, and the energy conservation and emission reduction effects are improved.

Description

Technical Field

[0001] This invention relates to the field of smart agricultural greenhouse heating, and in particular to a multi-source coupled heating device, method and multi-energy complementary coupled heating system. Background Technology

[0002] With the deepening of the "carbon peaking and carbon neutrality" strategy, the green transformation of agricultural production has become an inevitable trend. As the core carrier of modern facility agriculture, smart greenhouses face a critical bottleneck in achieving low-carbon development, particularly the high energy consumption for winter heating. Traditional heating methods, primarily based on gas-fired boilers, while offering stable energy and strong heating capacity, suffer from high operating costs and large carbon emissions, making them unsuitable for the new requirements of green agriculture.

[0003] In response to the call for low-carbon development, renewable resources such as air source heat pumps and solar energy have been applied in smart greenhouses. Air source heat pumps are highly energy efficient, but their heating efficiency is low and their stability is insufficient in extremely cold environments. Solar heating, while clean and low-carbon, is affected by day and night and weather conditions, resulting in intermittency and uncertainty. Therefore, single-energy application models all have inherent limitations and cannot achieve the best balance between reliability, economy, and environmental protection, becoming a technical pain point restricting the green upgrade of smart greenhouses.

[0004] Therefore, there is an urgent need for a multi-source coupled heating device, method, and multi-energy complementary coupled heating system to address the shortcomings of existing technologies. Summary of the Invention

[0005] One objective of this invention is to provide a multi-source coupled heating device that can reduce operating costs and carbon emissions while ensuring stable heating, and improve efficiency and stability in the heating process.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] A multi-source coupled heating device includes a heat-using terminal, and further includes a first heating module, a gas-fired boiler unit, a second heating module, and an energy storage module, wherein:

[0008] The liquid outlet of the first heating module is connected in parallel with the liquid outlet of the gas boiler unit and is connected to the heating port of the heat-using terminal. The liquid inlet of the first heating module is connected in parallel with the liquid inlet of the gas boiler unit and is connected to the liquid return port of the heat-using terminal. A control unit is provided between the liquid inlet of the first heating module and the liquid return port of the heat-using terminal. The control unit can control the connection and disconnection between the liquid return port of the heat-using terminal and the liquid inlet of the first heating module according to whether the real-time temperature of the target area reaches the allowable critical temperature.

[0009] The second heating module is cyclically connected to the energy storage module, and a heat exchange medium flows between the second heating module and the energy storage module. The second heating module is used to heat the heat exchange medium, and the heat exchange medium can exchange heat with the stored hot water in the energy storage module so that the heat exchange medium can heat the stored hot water.

[0010] The outlet of the energy storage module is connected to the inlet of the first heating module and the inlet of the gas boiler unit.

[0011] Preferably, a heating liquid pipe is connected between the outlet of the first heating module and the heating port of the heat-using terminal; a first reflux heating liquid pipe is connected between the inlet of the first heating module and the return outlet of the heat-using terminal; a diversion heating liquid pipe is connected between the inlet of the gas boiler unit and the heating liquid pipe; a second reflux heating liquid pipe is connected between the inlet of the gas boiler unit and the first reflux heating liquid pipe; the control unit is located on the first reflux heating liquid pipe downstream of the second reflux heating liquid pipe; a gas boiler heating liquid pipe is connected between the outlet of the gas boiler unit and the heat-using terminal; a heat exchange circulation liquid pipe is connected between the second heating module and the energy storage module, and the heat exchange medium is provided in the heat exchange circulation liquid pipe; a first energy storage supply liquid pipe is connected between the outlet of the energy storage module and the first reflux heating liquid pipe; a second energy storage supply liquid pipe is connected between the outlet of the energy storage module and the inlet of the gas boiler unit.

[0012] Preferably, the heating module is an air source heat pump heating module, which includes an air source heating circulation inlet pipe, an air source heating circulation outlet pipe, a first temperature and pressure sensor, an electromagnetic three-way valve, a first circulation drive pump, and at least two air source heat pump groups. The air source heating circulation inlet pipe, the heating pipe, and the air source heating circulation outlet pipe are connected through the electromagnetic three-way valve. The first temperature and pressure sensor is installed on the air source heating circulation outlet pipe and is communicatively connected to the electromagnetic three-way valve. The first circulation drive pump is installed on the air source heating circulation inlet pipe. At least two air source heat pump groups are connected in series between the air source heating circulation inlet pipe and the air source heating circulation outlet pipe. Each air source heat pump group includes at least two air source heat pumps connected in parallel.

[0013] Preferably, a bypass pipe is connected between the air source heating circulation liquid outlet pipe and the air source heating circulation liquid inlet pipe, and a bypass valve is provided on the bypass pipe; a waste discharge valve is provided at the end of the air source heating circulation liquid inlet pipe, and the bypass valve and the waste discharge valve are configured to have the same opening and closing state.

[0014] Preferably, a heat meter is installed on the heating liquid pipe upstream of the diversion heating liquid pipe, a fourth electromagnetic two-way valve is installed downstream of the diversion heating liquid pipe, a first electromagnetic two-way valve is installed on the diversion heating liquid pipe, and the heat meter is communicatively connected to the first electromagnetic two-way valve and the fourth electromagnetic two-way valve.

[0015] Preferably, the outlet of the diversion heating liquid pipe is connected to the first energy storage supply pipe;

[0016] The gas-fired boiler unit includes at least two gas-fired boiler heating inlet pipes, a gas-fired boiler heating outlet pipe, a gas-fired boiler unit, a boiler heat pump, and a heat supply switch valve. At least two gas-fired boiler units are arranged in parallel, and the outlet of the gas-fired boiler heating inlet pipe is connected to the inlet of the gas-fired boiler unit. The inlet of the gas-fired boiler heating inlet pipe is connected to the first energy storage supply pipe. The portion of the first energy storage supply pipe located between the first return heating pipe and the gas-fired boiler heating inlet pipe can form the second return heating pipe. The gas-fired boiler heating outlet pipe is connected to the gas-fired boiler heating pipe and the energy storage module. The gas-fired boiler heating outlet pipe is equipped with the boiler heat pump and the heat supply switch valve. The heat supply switch valve is communicatively connected to the heat meter.

[0017] When the heating switch valve is in the closed state, the gas boiler heating outlet pipe is disconnected from the gas boiler heating inlet pipe. When the heating switch valve is in the open state, the gas boiler heating outlet pipe is connected to the gas boiler heating inlet pipe, so that the hot water output from the outlet of the first heating module can flow along the diversion heating pipe and the first energy storage supply pipe to at least two of the gas boiler heating inlet pipes respectively.

[0018] Preferably, a diversion storage pipe is connected between the energy storage module and the gas boiler heating liquid outlet pipe near the energy storage module, and a third circulation drive pump is provided on the diversion storage pipe. The third circulation drive pump can transfer a portion of the boiler hot water output from the outlet of the gas boiler heating liquid outlet pipe to the energy storage module to form the stored hot water. The remaining portion of the boiler hot water can be transported to the heat-using terminal through the gas boiler heating liquid pipe.

[0019] Preferably, a second electromagnetic two-way valve is provided on the first energy storage liquid supply pipe. The second electromagnetic two-way valve is communicatively connected to the heat meter, and the second electromagnetic two-way valve is located between the energy storage module and the gas boiler heating liquid inlet pipe near the energy storage module.

[0020] Preferably, a third electromagnetic two-way valve is also provided on the first energy storage liquid supply pipe. The third electromagnetic two-way valve is communicatively connected to the heat meter. The third electromagnetic two-way valve is located on the first energy storage liquid supply pipe between the first return heating liquid pipe and the gas boiler heating inlet liquid pipe near the first return heating liquid pipe. The portion of the first energy storage liquid supply pipe located between the gas boiler heating inlet liquid pipe and the energy storage module can form the second energy storage liquid supply pipe.

[0021] When the temperature of the hot water supply does not meet the standard, the third electromagnetic two-way valve is in the closed state, the first electromagnetic two-way valve is in the open state, so that the second return heating liquid pipe is in the disconnected state, the diversion heating liquid pipe is in the connected state, the first energy storage liquid supply pipe is in the disconnected state, and the second energy storage liquid supply pipe is in the connected state.

[0022] When the temperature of the heated hot water reaches the standard, the third electromagnetic two-way valve is in the open state and the first electromagnetic two-way valve is in the closed state, so that the first return heating liquid pipe is in the connected state, the second return heating liquid pipe is in the connected state, the diversion heating liquid pipe is in the disconnected state, and the first energy storage supply liquid pipe is in the connected state.

[0023] When the real-time temperature is outside the allowable critical temperature, the third electromagnetic two-way valve is in the open state, the first electromagnetic two-way valve is in the closed state, and the control valve is in the closed state, so that the first return heating liquid pipe is in the disconnected state, the second return heating liquid pipe is in the connected state, the diversion heating liquid pipe is in the disconnected state, and the second energy storage supply liquid pipe is in the connected state.

[0024] Preferably, the heat exchange circulating liquid pipe is equipped with a second temperature and pressure sensor and a second circulation drive pump, and the second temperature and pressure sensor is communicatively connected to the second circulation drive pump.

[0025] Another objective of this invention is to provide a multi-source coupled heating method that can reduce operating costs and carbon emissions while ensuring stable heating, and improve efficiency and stability in the heating process.

[0026] To achieve this objective, the present invention adopts the following technical solution:

[0027] The multi-source coupled heating method, implemented using the aforementioned multi-source coupled heating device, includes the following steps:

[0028] S1. Obtain the real-time temperature of the target area and compare the real-time temperature with the allowable critical temperature. If the real-time temperature is outside the range of the allowable critical temperature, proceed to step S2; otherwise, proceed to step S3.

[0029] S2. Start the gas-fired boiler unit, and the boiler hot water formed after being heated by the gas-fired boiler unit is delivered to the heat-using terminal.

[0030] S3. Obtain the current temperature of the stored hot water in the energy storage module. If the current temperature of the stored hot water does not meet the standard, start the second heating module to heat the stored hot water, and then proceed to step S4; otherwise, proceed directly to step S4.

[0031] S4. Compare the real-time temperature with the target temperature. If the real-time temperature reaches the target temperature, proceed to step S5; otherwise, proceed to step S6.

[0032] S5. The heating module, the gas boiler unit and the second heating module are in standby mode;

[0033] S6. Start the heating module. The heated hot water formed by the heating module is delivered to the heat-using terminal. At the same time, the stored hot water in the energy storage module is delivered to the heating module. Determine whether the temperature of the heated hot water formed by the heating module meets the standard. If it does, proceed to step S7; otherwise, proceed to step S8.

[0034] S7. Keep the heating module turned on and continuously supply heat to the target area through the heating module;

[0035] S8. Start the gas-fired boiler unit, transfer the hot water output from the heating module to the gas-fired boiler unit for reheating, and at the same time, transport the stored hot water to the gas-fired boiler unit. The boiler hot water formed after being heated by the gas-fired boiler unit is then transferred to the heat-using terminal.

[0036] Another objective of this invention is to provide a multi-energy complementary coupling heating system that can reduce operating costs and carbon emissions while ensuring stable heating, and improve efficiency and stability in the heating process.

[0037] To achieve this objective, the present invention adopts the following technical solution:

[0038] A multi-energy complementary coupled heating system includes a control system and the aforementioned multi-source coupled heating device, wherein the control system is connected to the multi-source coupled heating device.

[0039] The beneficial effects of this invention are:

[0040] This invention provides a multi-source coupled heating device. When used under sunny conditions, the device heats the stored hot water in the energy storage module via a second heating module, maintaining the stored hot water at a high temperature. When the heating module is activated, the stored hot water, along with cold water, is collected and delivered to the heating module, raising the cold water temperature to a certain extent. This helps to heat the cold water to the required temperature using only the heating module without using a gas-fired boiler unit, reducing both the power consumption of the heating module and overall energy consumption. Furthermore, in extreme environments or when the heated hot water from the heating module does not reach the required temperature, only the gas-fired boiler unit is activated. This ensures stable heating to the user even under extreme conditions, and by providing stored hot water to the gas-fired boiler unit through the energy storage module, the temperature of the cold water entering the boiler unit is raised to a certain extent, effectively reducing the energy consumption required for the gas-fired boiler unit to heat the cold water to the required temperature. Through these configurations, not only is the heating stable, but the operating costs and carbon emissions are also lower, significantly improving the efficiency and stability of the heating process.

[0041] This embodiment also provides a multi-source coupled heating method. This method enables the greenhouse to obtain hot water at a stable temperature under different ambient temperature conditions, reducing the impact of environmental changes on heating and improving the temperature stability of the greenhouse. Furthermore, when supplying hot water to the greenhouse using the first heating module or gas-fired boiler unit, the stored hot water in the energy storage module can raise the temperature of the cold water entering the heating module, or the cold water or hot water entering the gas-fired boiler unit. This effectively reduces the heating load, operating energy consumption, and start-up energy consumption of the first heating module or gas-fired boiler unit, while shortening the heating time and improving the operating efficiency, service life, and energy saving and emission reduction effects of the first heating module or gas-fired boiler unit.

[0042] This embodiment also provides a multi-energy complementary coupling heating system. By setting up the multi-source coupling heating device described above, it is possible to achieve on-demand coordinated scheduling of multiple energy sources. It can make full use of renewable energy sources such as sunshine for energy storage and preheating, and can also provide precise heat supplementation through the first heating module and gas boiler unit. Thus, it can be used in different complex working conditions, greatly improving the stability of heating. At the same time, it can achieve efficient complementarity between renewable energy and traditional energy, taking into account the advantages of environmental protection, practicality and low cost. Attached Figure Description

[0043] Figure 1 This is a schematic diagram of the structure of the multi-source coupled heating device provided in an embodiment of the present invention;

[0044] Figure 2 This is a schematic flowchart of the multi-source coupled heating method provided in the embodiments of the present invention.

[0045] In the picture:

[0046] 1. Heating terminal; 101. Water distributor; 102. Water collector;

[0047] 2. First heating module; 201. Air source heating circulating liquid inlet pipe; 2011. Waste discharge valve; 202. Air source heating circulating liquid outlet pipe; 203. First temperature and pressure sensor; 204. Solenoid three-way valve; 205. First circulation drive pump; 206. Air source heat pump unit;

[0048] 3. Gas-fired boiler unit; 301. Gas-fired boiler heating inlet pipe; 302. Gas-fired boiler heating outlet pipe; 303. Gas-fired boiler unit; 304. Boiler heat pump; 305. Heating switch valve;

[0049] 4. Second heating module;

[0050] 5. Energy storage module;

[0051] 6. Heating liquid pipe; 601. Heat meter; 602. Fourth solenoid two-way valve;

[0052] 7. First reflux heating liquid pipe;

[0053] 8. Diverting heating liquid pipe; 801. First solenoid two-way valve;

[0054] 9. Heating liquid pipes for gas-fired boilers;

[0055] 10. Diversion storage liquid pipe; 1001. Third circulation drive pump;

[0056] 11. First energy storage liquid supply pipe; 1101. Second solenoid two-way valve; 1102. Third solenoid two-way valve;

[0057] 12. Heat exchange circulating liquid pipe; 1201. Second temperature and pressure sensor; 1202. Second circulation drive pump;

[0058] 13. Bypass liquid line; 1301. Bypass valve;

[0059] 14. Control unit. Detailed Implementation

[0060] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0061] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0062] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0063] In the description of this embodiment, the terms "upper," "lower," "right," and "left," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0064] The technical solution provided by the present invention will be described below with reference to the accompanying drawings and specific embodiments.

[0065] refer to Figure 1As shown, the present invention provides a multi-source coupled heating device, including a heat terminal 1, a first heating module 2, a gas boiler unit 3, a second heating module 4, and an energy storage module 5. The first heating module 2 has its outlet connected in parallel with the gas boiler unit 3, and both are connected to the heating port of the heat-using terminal 1. The first heating module 2 has its inlet connected in parallel with the gas boiler unit 3, and both are connected to the return port of the heat-using terminal 1. A control unit 14 is provided between the inlet of the first heating module 2 and the return port of the heat-using terminal 1. The control unit 14 can control the connection between the return port of the heat-using terminal 1 and the inlet of the first heating module 2 based on whether the real-time temperature of the target area has reached the allowable critical temperature. The second heating module 4 is cyclically connected to the energy storage module 5, and a heat exchange medium flows between the second heating module and the energy storage module 5. The second heating module 4 is used to heat the heat exchange medium, and the heat exchange medium can exchange heat with the stored hot water in the energy storage module 5 so that the heat exchange medium can heat the stored hot water. The outlet of the energy storage module 5 is connected to the inlet of the first heating module 2 and the inlet of the gas boiler unit 3.

[0066] For example, this device can be applied to a smart greenhouse heating scenario; the second heating module 4 adopts a solar heating module. When the device is used under sunny conditions, the second heating module 4 can heat the stored hot water in the energy storage module 5, so that the stored hot water can maintain a high temperature. In this way, when the energy storage module 5 is started and used to heat the cold water delivered from the heat-using terminal 1, the stored hot water can be collected and delivered to the first heating module 2 together with the cold water, so that the temperature of the cold water is raised to a certain extent. This helps to heat the cold water to the required temperature through the energy storage module 5 alone without using the gas boiler unit 3, which not only reduces the power consumption of the first heating module 2, but also helps to reduce the energy loss of the entire device. In addition, in extreme environments (such as when the greenhouse is in an extremely cold environment), only the gas boiler unit 3 is activated, so that hot water is supplied to the heat terminal 1 only through the gas boiler unit 3; or, if the temperature of the hot water formed after heating by the first heating module 2 does not meet the standard, the hot water will be transported to the gas boiler unit 3 again for a second heating, so that the boiler hot water can meet the temperature requirements of the heat terminal 1, thereby ensuring the stability of the hot water temperature.

[0067] Through the above configuration, on the one hand, the device can ensure stable heat supply to the heat-using terminal 1 even under extreme environmental conditions; on the other hand, it also provides stored hot water to the gas-fired boiler unit 3 through the energy storage module 5, so that the temperature of the cold water entering the gas-fired boiler unit 3 can be increased to a certain extent, thereby effectively reducing the energy consumption required for the gas-fired boiler unit 3 to heat the cold water to the required standard. The device provided in this embodiment not only provides stable heating, but also has lower operating costs and carbon emissions, improving the efficiency and stability of the heating process.

[0068] Those skilled in the art will understand that the second heating module 4 utilizes clean and renewable energy to heat the energy storage module 5, thereby further reducing the energy loss rate and cost of the device. Optionally, in other parallel embodiments, the second heating module 4 may also be one or more of a geothermal heating module, a biomass heating module, and an air source heat pump heating module. When the second heating module 4 is a combination of the above-mentioned modules, it enables the second heating module 4 to achieve dynamic matching of heating load through coordinated control under different environmental conditions (such as light intensity, ambient temperature, and available geothermal resources) or heating demand, thereby improving the stability, energy efficiency, and environmental friendliness of the second heating module 4.

[0069] Specifically, in this embodiment, a heating liquid pipe 6 connects the heating port of the heating terminal 1 to the liquid outlet of the first heating module 2, and a first return heating liquid pipe 7 connects the return liquid port of the heating terminal 1 to the liquid inlet of the first heating module 2, thereby enabling the circulation of hot and cold water between the heating terminal 1 and the first heating module 2; a diversion heating liquid pipe 8 connects the liquid inlet of the gas boiler unit 3 to the heating liquid pipe 6, so that when the temperature of the hot water formed after heating by the first heating module 2 is not up to standard, the hot water can be transported along the diversion heating liquid pipe 8 to the gas boiler unit 3 for reheating; a second return heating liquid pipe connects the liquid inlet of the gas boiler unit 3 to the first return heating liquid pipe 7, facilitating the direct transport of cold water in the heating terminal 1 to the gas boiler unit 3 for heating in extreme environments (e.g., in an extremely cold greenhouse); the first return heating liquid pipe 7 is located on the second return heating liquid pipe A control unit 14 is provided on the downstream side, which can control the opening and closing of the first return heating liquid pipe 7 according to whether the real-time temperature of the target area reaches the allowable critical temperature. A gas boiler heating liquid pipe 9 is connected between the outlet of the gas boiler unit 3 and the heat-using terminal 1, so that the heated boiler hot water can be delivered to the heat-using terminal 1 for direct use. A heat exchange circulation liquid pipe 12 is connected between the second heating module 4 and the energy storage module 5. The heat exchange circulation liquid pipe 12 is provided with the aforementioned heat exchange medium, so that when the second heating module 4 is turned on, the second heating module 4 can use solar energy to heat the heat exchange medium. A first energy storage liquid pipe 11 is connected between the outlet of the energy storage module 5 and the first return heating liquid pipe 7, and a second energy storage liquid pipe is connected between the outlet of the energy storage module 5 and the inlet of the gas boiler unit 3, so that the energy storage module 5 can deliver the required stored hot water to the first heating module 2 and the second heating module 4 respectively.

[0070] In this embodiment, the heating terminal 1 includes a water distributor 101 and a water collector 102. The water distributor 101 is connected to the outlet of the first heating module 2 via a heating liquid pipe 6, and the water collector 102 is connected to the inlet of the first heating module 2 via a first return heating liquid pipe 7. The water collector 102 can collect the return water inside or near the greenhouse and transport it to the first heating module 2 or the gas boiler unit 3 for heating through the first return heating liquid pipe 7. The heated hot water or boiler hot water can be provided to the greenhouse through the water distributor 101 to achieve the purpose of heating the crops in the greenhouse.

[0071] Preferably, the water used in the device is softened water, which can prevent the formation of scale, ensure the flow rate and stability of water in the device, reduce the number of machine maintenance operations, and improve service life.

[0072] The first heating module 2 can be any one of an air source heat pump heating module, a ground source heat pump heating module, a biomass energy heating module, or a photovoltaic direct-drive heat pump module. All of the above module types can meet the requirements of clean and low carbon emissions and excellent heating performance. This invention does not limit the type of module.

[0073] Specifically, in this embodiment, the first heating module 2 is an air source heat pump heating module, which is not only convenient to install and maintain and highly adaptable to operating conditions, but also meets the requirements of excellent energy saving, clean and environmentally friendly operation, and economical use. (Reference) Figure 1 As shown, the first heating module 2 specifically includes an air source heating circulating liquid inlet pipe 201, an air source heating circulating liquid outlet pipe 202, a first temperature and pressure sensor 203, an electromagnetic three-way valve 204, a first circulation drive pump 205, and 10 air source heat pump groups 206.

[0074] The air source heating circulation inlet pipe 201, the heating liquid pipe 6, and the air source heating circulation outlet pipe 202 are connected by an electromagnetic three-way valve 204. The first temperature and pressure sensor 203 is installed on the air source heating circulation outlet pipe 202 and is communicatively connected to the electromagnetic three-way valve 204. The first circulation drive pump 205 is installed on the air source heating circulation inlet pipe 201. Ten air source heat pump groups 206 are connected in series between the air source heating circulation inlet pipe 201 and the air source heating circulation outlet pipe 202, and each air source heat pump group 206 includes two air source heat pumps connected in parallel.

[0075] With the above settings, the cold water in the air source heating circulation inlet pipe 201 can be heated by 20 air source heat pumps, ensuring higher stability of water temperature and pressure in the air source heating circulation outlet pipe 202, and facilitating accurate detection by the first temperature and pressure sensor 203. The heated hot water is collected in the air source heating circulation outlet pipe 202 and then transported to the air source heat pump unit 206 for circulation heating through the electromagnetic three-way valve 204 and the air source heating circulation inlet pipe 201. When the first temperature and pressure sensor 203 detects that the water temperature and pressure in the air source heating circulation outlet pipe 202 have reached the upper limit of heating (i.e., the temperature of the heated hot water meets the standard), the first temperature and pressure sensor 203 immediately sends a signal to the control system (PLC), so that the control system can control the electromagnetic three-way valve 204 to connect the heating pipe 6 and the air source heating circulation outlet pipe 202 and shut off the air source heating circulation outlet pipe 202 and the air source heating inlet pipe, so that the hot water can be transported to the heating pipe 6 for the next step of judgment and processing.

[0076] For example, in this embodiment, a heat meter 601 is provided on the heating liquid pipe 6 at the upstream side of the diversion heating liquid pipe 8, and a fourth electromagnetic two-way valve 602 is provided at the downstream side of the diversion heating liquid pipe 8. A first electromagnetic two-way valve 801 is provided on the diversion heating liquid pipe 8. The heat meter 601 is communicatively connected to the first electromagnetic two-way valve 801 and the fourth electromagnetic two-way valve 602.

[0077] In practical use, the heat meter 601 can detect the temperature of the hot water delivered to the heating liquid pipe 6, and can also accurately measure and record the total heat transferred by the hot water during the heat exchange process, including instantaneous heat and cumulative heat, in order to evaluate the system's energy efficiency. The heat meter 601 can transmit the detection results to the control system, which then issues commands to the first solenoid two-way valve 801 and the fourth solenoid two-way valve 602. The first solenoid two-way valve 801 and the fourth solenoid two-way valve 602 open and close according to the commands, thereby achieving precise control of the flow direction of the heated hot water. In other words, when the heat meter 601 detects that the temperature of the hot water meets the standard, the first electromagnetic two-way valve 801 can be adjusted to the closed state, and the fourth electromagnetic two-way valve 602 can be adjusted to the open state. This cuts off the distribution heating liquid pipe 8 and opens the heating liquid pipe 6, allowing all the hot water to be transferred to the distributor 101, and then to the greenhouse. When the temperature of the hot water meets the standard, the control system commands the first electromagnetic two-way valve 801 to open and the fourth electromagnetic two-way valve 602 to close. At this time, the distribution heating liquid pipe 8 is in a connected state, while the heating liquid pipe 6 is in a closed state, allowing all the hot water to be transferred to the gas boiler unit 3 for secondary heating. The temperature of the boiler hot water formed after secondary heating is usually up to standard, allowing the boiler hot water to be transported to the distributor 101 along the gas boiler heating liquid pipe 9. In this way, with the supplementary heating effect of the gas boiler unit 3, the temperature of the hot water delivered to the distributor 101 can always meet the temperature requirements, ensuring the temperature stability of the hot water supply.

[0078] Preferably, in this embodiment, the first circulating drive pump 205 is a variable frequency circulating pump, which can adjust the speed through variable frequency drive technology to achieve on-demand function, and performs better in terms of energy efficiency than traditional fixed frequency pumps.

[0079] Optionally, in this embodiment, a bypass pipe 13 is connected between the air source heating circulation liquid outlet pipe 202 and the air source heating circulation liquid inlet pipe 201, and a bypass valve 1301 is provided on the bypass pipe 13; a waste discharge valve 2011 is provided at the end of the air source heating circulation liquid inlet pipe 201, and the bypass valve 1301 and the waste discharge valve 2011 are configured to have the same opening and closing state.

[0080] For example, in specific use, after the various connected pipes in the first heating module 2 are welded together at the nodes, both the bypass valve 1301 and the waste discharge valve 2011 are opened, so that part of the cleaning liquid flowing in from the inlet of the water collector 102 can pass sequentially through the first return heating liquid pipe 7 and the air source heating circulation inlet liquid pipe 201, and carry the welding slag and other impurities in the air source heating circulation inlet liquid pipe 201 out of the air source heating circulation inlet liquid pipe 201 through the waste discharge valve 2011; at the same time, another part of the cleaning liquid is discharged through the electromagnetic three-way valve. The liquid flows into the air source heating circulation outlet pipe 202 through the bypass valve 204, carrying welding slag and other impurities in the air source heating circulation outlet pipe 202 into the air source heating circulation inlet pipe 201 through the bypass valve 1301. It then merges with a portion of the cleaning liquid in the air source heating circulation inlet pipe 201 and is discharged together with the waste discharge valve 2011. This process effectively removes welding slag and other impurities from the first heating module 2, preventing impurities from clogging precision instruments such as the electromagnetic three-way valve 204, improving safety, and extending service life.

[0081] In addition, when both the bypass valve 1301 and the waste discharge valve 2011 are closed, the hot water is ensured to be circulated and heated sequentially through the air source heating circulation inlet pipe 201 and the air source heating circulation outlet pipe 202, and the temperature is rapidly increased through the air source heat pump, thereby achieving the normal heating effect of the first heating module 2.

[0082] Optionally, in this embodiment, the outlet of the diversion heating liquid pipe 8 is connected to the first energy storage supply liquid pipe 11; the gas boiler unit 3 includes two gas boiler heating inlet liquid pipes 301, a gas boiler heating outlet liquid pipe 302, a gas boiler unit 303, a boiler heat pump 304, and a heat supply switch valve 305. The two gas boiler units 303 are arranged in parallel, and the outlet of the gas boiler heating inlet liquid pipe 301 is connected to the inlet of the gas boiler unit 303, and the inlet of the gas boiler heating inlet liquid pipe 301 is connected to the first energy storage supply liquid pipe 11. The portion of the first energy storage supply pipe 11 located between the first return heating liquid pipe 7 and the gas boiler heating inlet liquid pipe 301 can form the aforementioned second return heating liquid pipe. The gas boiler heating outlet liquid pipe 302 is connected to the gas boiler heating liquid pipe 9 and the energy storage module 5. The gas boiler heating outlet liquid pipe 302 is equipped with a boiler heating pump 304 and a heating switch valve 305. The heating switch valve 305 is communicatively connected to the heat meter 601, so that the heat meter 601 can control the opening and closing state of the heating switch valve 305 through the control system based on the temperature detection results.

[0083] Specifically, in this embodiment, when the heat meter 601 detects that the temperature of the hot water discharged from the first heating module 2 meets the standard, it can control the heating switch valve 305 to be adjusted to the closed state through the control system. When the heating switch valve 305 is in the closed state, the gas boiler heating liquid outlet pipe 302 is disconnected from the gas boiler heating liquid inlet pipe 301. In this way, the stored hot water output from the energy storage module 5 can be directly transported to the first return heating liquid pipe 7 along the first energy storage liquid supply pipe 11. When the heat meter 601 detects that the temperature of the heated hot water is below standard, the heat meter 601 can adjust the heating switch valve 305 to the open state through the control system. When the heating switch valve 305 is in the open state, the gas boiler heating outlet pipe 302 and the gas boiler heating inlet pipe 301 can be connected through the first energy storage supply pipe 11, so that the heated hot water output from the outlet of the first heating module 2 can flow along the diversion heating liquid pipe 8 and the first energy storage supply pipe 11 to the two gas boiler heating inlet pipes 301 respectively, and achieve secondary heating through the two gas boiler units 303 to form boiler hot water with the standard temperature. Through the above setting, by integrating the first energy storage supply pipe 11 and the second return heating liquid pipe into one unit, the compactness and integrity of the device can be improved, the layout structure is more reasonable, and it is convenient for centralized management and control.

[0084] In this embodiment, a second electromagnetic two-way valve 1101 is provided on the first energy storage liquid supply pipe 11. The second electromagnetic two-way valve 1101 is communicatively connected to the heat meter 601, and the second electromagnetic two-way valve 1101 is located between the energy storage module 5 and the gas boiler heating liquid inlet pipe 301 near the energy storage module 5.

[0085] Specifically, when the heat meter 601 detects that the temperature of the hot water in the heating liquid pipe 6 is below standard, the heat meter 601 can first adjust the second electromagnetic two-way valve 1101 to the closed state through the control system, and at the same time adjust the heating switch valve 305 to the open state, so that the hot water in the heating liquid pipe 6 can be transported along the first energy storage liquid supply pipe 11 to the heating liquid inlet pipes 301 of the two gas boilers respectively; then the control system controls the second electromagnetic two-way valve 1101 to open, so that the stored hot water in the energy storage module 5 can flow along the first energy storage liquid supply pipe 11 to the heating liquid inlet pipes 301 of the two gas boilers respectively. Inside the liquid pipe 301, the hot water is fused with the pre-entered hot water in the gas boiler unit 303 and then heated by the gas boiler unit 303. Since the stored hot water in the energy storage module 5 is supplied from the gas boiler unit 3, the temperature of the stored hot water is usually higher than the temperature of the hot water output from the heating liquid pipe 6. This effectively increases the initial temperature of the hot water entering the gas boiler unit 303, allowing the gas boiler unit 303 to heat the hot water to the standard temperature in a shorter time, thereby reducing the energy consumption of the gas boiler unit 303 and saving resources.

[0086] Optionally, the first energy storage supply pipe 11 provided in this embodiment is further provided with a third electromagnetic two-way valve 1102. The third electromagnetic two-way valve 1102 is communicatively connected to the heat meter 601, and is located between the first return heating liquid pipe 7 and the gas boiler heating inlet liquid pipe 301 near the first return heating liquid pipe 7. The portion of the first energy storage supply pipe 11 located between the gas boiler heating inlet liquid pipe 301 and the energy storage module 5 can form the aforementioned second energy storage supply pipe. It can be understood that in this embodiment, the second electromagnetic two-way valve 1101 is located on the second energy storage supply pipe, and the third electromagnetic two-way valve 1102 is located on the second return heating liquid pipe.

[0087] In practical use, when the temperature of the heated hot water does not meet the standard, the heat meter 601 sends the detection result to the control system. At this time, the third electromagnetic two-way valve 1102 is adjusted to the closed state, and the first electromagnetic two-way valve 801 is adjusted to the open state, so that the second return heating liquid pipe is in the disconnected state, the diversion heating liquid pipe 8 is in the connected state, the first energy storage supply pipe 11 is in the disconnected state, and the second energy storage supply pipe is in the connected state, so that the heated hot water output from the first heating module 2 can be transported to the gas boiler heating inlet pipe 301 through the diversion heating liquid pipe 8 and the first energy storage supply pipe 11. Subsequently, the control system sends an opening command to the second electromagnetic two-way valve 1101, and the second electromagnetic two-way valve 1101 opens, so that the second energy storage supply pipe is connected. The stored hot water in the energy storage module 5 can be transported to the gas boiler unit 303 through the second energy storage supply pipe and the gas boiler heating inlet pipe 301 to achieve the mixing of stored hot water and heated hot water. The above settings can effectively increase the temperature of the hot water supply, thereby reducing the power consumption of the gas boiler unit 3 and lowering its energy consumption.

[0088] When the temperature of the heated hot water reaches the standard, the heat meter 601 sends the detection result to the control system. The control system then adjusts the third solenoid two-way valve 1102 to the open state and the first solenoid two-way valve 801 to the closed state. This ensures that the first return heating liquid pipe 7 and the second return heating liquid pipe are connected, the diversion heating liquid pipe 8 is disconnected, and the first energy storage supply pipe 11 is connected. In this way, when the temperature of the heated hot water reaches the standard, the device can maintain the operation of supplying stored hot water to the first heating module 2 through the energy storage module 5 and the first energy storage supply pipe 11, thus avoiding the need to start the gas boiler unit 3 and maintaining its low-carbon and economical advantages.

[0089] When the real-time temperature of the greenhouse is outside the allowable critical temperature, the control system adjusts the third electromagnetic two-way valve 1102 to the open state, the first electromagnetic two-way valve 801 to the closed state, and the control unit 14 to the closed state, so that the first return heating liquid pipe 7 is disconnected, the second return heating liquid pipe is connected, the diversion heating liquid pipe 8 is disconnected, and the second energy storage supply liquid pipe is connected. In this way, when the real-time temperature of the greenhouse is outside the allowable critical temperature, the cold water output from the water collector 102 can be directly transported to the two gas boiler units 303 through the second return heating liquid pipe, directly heated to boiler hot water, and then directly supplied to the water distributor 101 for use through the gas boiler heating liquid pipe 9, thereby achieving the purpose of ensuring stable heating of the device under extreme environmental conditions.

[0090] It should be further explained that, in this embodiment, a diversion storage pipe 10 is connected between the energy storage module 5 and the gas boiler heating liquid outlet pipe 302 near the energy storage module 5, and a third circulation drive pump 1001 is provided on the diversion storage pipe 10. The third circulation drive pump 1001 can transfer a portion of the boiler hot water output from the outlet of the gas boiler heating liquid outlet pipe 302 to the energy storage module 5 to form stored hot water. The remaining portion of the boiler hot water can be transported to the water distributor 101 through the gas boiler heating liquid pipe 9. Thus, while ensuring that the water distributor 101 receives sufficient hot water, it can also replenish the stored hot water in the energy storage module 5 to ensure that the liquid volume in the energy storage module 5 is sufficient.

[0091] Optionally, in this embodiment, reference is made to Figure 1 As shown, a second temperature and pressure sensor 1201 and a second circulation drive pump 1202 are installed on the heat exchange circulation liquid pipe 12. The second temperature and pressure sensor 1201 is communicatively connected to the second circulation drive pump 1202. The second temperature and pressure sensor 1201 can detect the temperature and pressure of the heat exchange medium in real time and transmit the detection results to the second circulation drive pump 1202. This allows the second circulation drive pump 1202 to adjust its operating power in real time according to the detection results to regulate the flow rate of the heat exchange medium. By adjusting the temperature of the stored hot water in the energy storage module 5 in the above manner, the energy storage module 5 can deliver the stored hot water at a suitable temperature to the first return heating liquid pipe 7, thereby realizing the use of solar energy to preheat the hot water in the energy storage module 5, improving the initial operating temperature of the first heating module 2 and the system energy efficiency. Preferably, in this embodiment, the energy storage module 5 is a water storage tank.

[0092] This implementation also provides a multi-source coupled heating method, which is implemented using the multi-source coupled heating device described above, see reference. Figure 2 As shown, the method specifically includes the following steps:

[0093] S1. Obtain the real-time temperature of the target area and compare the real-time temperature with the allowable critical temperature. If the real-time temperature is outside the allowable critical temperature range, proceed to step S2; otherwise, proceed to step S3.

[0094] It should be noted that the device also includes a heat dissipation module. In step S1, the heat dissipation module is used to: when the real-time temperature is outside the allowable critical temperature but higher than the allowable critical temperature, the control system sends an activation command to the heat dissipation module to start it up, thereby cooling the greenhouse and reducing the impact of ambient temperature on the use of the first heating module 2 or the gas boiler unit 3. Optionally, the heat dissipation module uses an exhaust fan unit, which is cost-effective and can meet the cooling requirements of actual working conditions.

[0095] S2. Start the gas boiler unit 3, and the boiler hot water formed after being heated by the gas boiler unit 3 is delivered to the heat-using terminal;

[0096] Specifically, when the real-time temperature is outside the allowable critical temperature range and below it, forcibly activating the first heating module 2 would cause its energy consumption to spike, significantly reducing its heating efficiency and potentially leading to equipment malfunction or even damage. Therefore, under these environmental conditions, adjusting the system to use the gas-fired boiler unit 3 to heat the cold water to the required hot water temperature ensures that the hot water temperature can quickly reach the target, thus achieving the goal of stably supplying hot water to the heat-consuming terminal 1.

[0097] S3. Obtain the current temperature of the stored hot water in the energy storage module 5. If the current temperature of the stored hot water does not meet the standard, start the second heating module 4 to heat the stored hot water, and then proceed to step S4; otherwise, proceed directly to step S4.

[0098] Specifically, in this embodiment, the second heating module 4 uses solar energy to heat the stored hot water. Under sufficient sunlight, the second heating module 4 can start at any time and maintain the heating of the stored hot water, so that the temperature of the stored hot water can always remain constant and stable. When there is insufficient sunlight, the second heating module 4 can automatically shut down, thereby saving energy consumption and reducing operating costs. Through step S3, it is ensured that the temperature of the stored hot water in the energy storage module 5 can be maintained within a suitable temperature range, while reducing the energy loss of heating the stored hot water.

[0099] S4. Compare the real-time temperature with the target temperature. If the real-time temperature reaches the target temperature, proceed to step S5; otherwise, proceed to step S6.

[0100] S5. The first heating module 2, the gas boiler unit 3, and the second heating module 4 are in standby mode.

[0101] Specifically, when the real-time temperature of the greenhouse reaches the target temperature, it indicates that the temperature inside the greenhouse is suitable and meets the environmental conditions for crop growth. Therefore, it is not necessary for the first heating module 2 and the gas boiler unit 3 to provide heating, nor is it necessary for the second heating module 4 to heat the stored hot water in the energy storage module 5, further reducing heat loss.

[0102] S6. Start the first heating module 2. The heated hot water formed by the first heating module 2 is delivered to the heat terminal 1. At the same time, the stored hot water in the energy storage module 5 is delivered to the first heating module 2. Determine whether the temperature of the heated hot water formed by the first heating module 2 meets the standard. If it does, proceed to step S7; otherwise, proceed to step S8.

[0103] S7. Keep the first heating module 2 open and continuously supply heat to the target area through the first heating module 2;

[0104] Specifically, in step S7, the first heating module 2 can effectively reduce the overall operating cost and power consumption of the device, while improving the system's heating efficiency. For example, in this embodiment, the first heating module 2 is an air source heat pump module unit. Under the current operating conditions, the cumulative heating capacity of the air source heat pump module unit in the past month is approximately 807,795.1 kWh, the power consumption is approximately 261,640.2 kWh, the cost is approximately 130,820.1 yuan, and the system energy efficiency is approximately 3.09. If only the gas boiler unit 3 is used, under the same cumulative heating capacity, the cumulative cost of using the gas boiler unit 3 would be approximately 380,128.8 yuan, and the system energy efficiency would be approximately 0.85. Therefore, by using the air source heat pump module unit, the unit heat cost of the device can be reduced from 0.470 yuan / kWh to 0.162 yuan / kWh, a cost reduction of 65.5%; the system energy efficiency (COP) is increased from 0.85 to 3.09, an increase of approximately 264%.

[0105] S8. Start the gas boiler unit 3, and transfer the hot water output from the first heating module 2 to the gas boiler unit 3 for reheating. At the same time, store hot water and transport it to the gas boiler unit 3. The boiler hot water formed after being heated by the gas boiler unit 3 is transferred to the heat-using terminal.

[0106] The multi-source coupled heating method provided in this embodiment enables the greenhouse to obtain hot water at a stable temperature under different ambient temperature conditions, reducing the impact of environmental changes on heating and improving the temperature stability of the greenhouse. Furthermore, when supplying hot water to the greenhouse using the first heating module 2 or the gas-fired boiler unit 3, the stored hot water in the energy storage module can raise the temperature of the cold water entering the heating module, or the cold water or hot water entering the gas-fired boiler unit 3. This effectively reduces the heating load, operating energy consumption, and start-up energy consumption of the first heating module 2 or the gas-fired boiler unit 3, while shortening the heating time and improving the operating efficiency, service life, and energy saving and emission reduction effects of the first heating module 2 or the gas-fired boiler unit 3.

[0107] This embodiment also provides a multi-energy complementary coupled heating system, including a control system and the multi-source coupled heating device described above. The control system is connected to components such as the first heating module 2, the gas boiler unit 3, the second heating module 4, the energy storage module 5, and the control unit 14 in the multi-source coupled heating device. In this system, by setting up the aforementioned multi-source coupled heating device, it is possible to achieve on-demand coordinated scheduling of multiple energy sources. It can fully utilize renewable energy for energy storage and preheating, and can also provide precise heat supplementation through the first heating module 2 and the gas boiler unit 3. Thus, it can be used in various complex operating conditions, significantly improving heating stability. At the same time, it can achieve efficient complementarity between renewable energy and traditional energy, taking into account the advantages of environmental protection, practicality, and low cost.

[0108] In the description of this specification, references to terms such as "some embodiments," "other embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0109] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A multi-source coupled heating device, comprising a heat-using terminal (1), characterized in that, It also includes a first heating module (2), a gas boiler unit (3), a second heating module (4), and an energy storage module (5), wherein: The liquid outlet of the first heating module (2) is connected in parallel with the liquid outlet of the gas boiler unit (3) and both are connected to the heating port of the heat-using terminal (1). The liquid inlet of the first heating module (2) is connected in parallel with the liquid inlet of the gas boiler unit (3) and both are connected to the liquid return port of the heat-using terminal (1). A control unit (14) is provided between the liquid inlet of the first heating module (2) and the liquid return port of the heat-using terminal (1). The control unit (14) can control the connection and disconnection between the liquid return port of the heat-using terminal (1) and the liquid inlet of the first heating module (2) according to whether the real-time temperature of the target area reaches the allowable critical temperature. The second heating module (4) is cyclically connected to the energy storage module (5), and a heat exchange medium is circulated between the second heating module (4) and the energy storage module (5). The second heating module (4) is used to heat the heat exchange medium, and the heat exchange medium can exchange heat with the stored hot water in the energy storage module (5) so that the heat exchange medium can heat the stored hot water. The outlet of the energy storage module (5) is connected to the inlet of the first heating module (2) and the inlet of the gas boiler unit (3).

2. The multi-source coupled heating device according to claim 1, characterized in that, A heating liquid pipe (6) is connected between the outlet of the first heating module (2) and the heating port of the heating terminal (1), and a first return heating liquid pipe (7) is connected between the inlet of the first heating module (2) and the return outlet of the heating terminal (1); a diversion heating liquid pipe (8) is connected between the inlet of the gas boiler unit (3) and the heating liquid pipe (6), and a second return heating liquid pipe is connected between the inlet of the gas boiler unit (3) and the first return heating liquid pipe (7); the control unit (14) is located on the first return heating liquid pipe (7) at the first Downstream of the second reflux heating liquid pipe, the outlet of the gas boiler unit (3) is connected to the heat terminal (1) via a gas boiler heating liquid pipe (9); the second heating module (4) is connected to the energy storage module (5) via a heat exchange circulating liquid pipe (12), and the heat exchange circulating liquid pipe (12) contains the heat exchange medium; the outlet of the energy storage module (5) is connected to the first reflux heating liquid pipe (7) via a first energy storage supply pipe (11), and the outlet of the energy storage module (5) is connected to the inlet of the gas boiler unit (3) via a second energy storage supply pipe.

3. The multi-source coupled heating device according to claim 2, characterized in that, The first heating module (2) is an air source heat pump heating module. The first heating module (2) includes an air source heating circulation inlet pipe (201), an air source heating circulation outlet pipe (202), a first temperature and pressure sensor (203), an electromagnetic three-way valve (204), a first circulation drive pump (205), and at least two air source heat pump groups (206). The air source heating circulation inlet pipe (201), the heating pipe (6), and the air source heating circulation outlet pipe (202) are connected through the electromagnetic three-way valve (204). The first temperature and pressure sensor (203) is installed on the air source heating circulation outlet pipe (202) and is connected in communication with the electromagnetic three-way valve (204). The first circulation drive pump (205) is installed on the air source heating circulation inlet pipe (201). At least two air source heat pump groups (206) are connected in series between the air source heating circulation inlet pipe (201) and the air source heating circulation outlet pipe (202). The air source heat pump group (206) includes at least two air source heat pumps connected in parallel.

4. The multi-source coupled heating device according to claim 3, characterized in that, A bypass pipe (13) is connected between the air source heating circulation liquid outlet pipe (202) and the air source heating circulation liquid inlet pipe (201), and a bypass valve (1301) is provided on the bypass pipe (13); a waste discharge valve (2011) is provided at the end of the air source heating circulation liquid inlet pipe (201), and the bypass valve (1301) and the waste discharge valve (2011) are configured to have the same opening and closing state.

5. The multi-source coupled heating device according to claim 3, characterized in that, A heat meter (601) is installed on the heating liquid pipe (6) upstream of the diversion heating liquid pipe (8), and a fourth electromagnetic two-way valve (602) is installed on the diversion heating liquid pipe (8). A first electromagnetic two-way valve (801) is installed on the diversion heating liquid pipe (8). The heat meter (601) is communicatively connected to the first electromagnetic two-way valve (801) and the fourth electromagnetic two-way valve (602).

6. The multi-source coupled heating device according to claim 5, characterized in that, The outlet of the diversion heating liquid pipe (8) is connected to the first energy storage liquid supply pipe (11); The gas-fired boiler unit (3) includes at least two gas-fired boiler heating inlet pipes (301), a gas-fired boiler heating outlet pipe (302), a gas-fired boiler unit (303), a boiler heat pump (304), and a heat supply switch valve (305). At least two of the gas-fired boiler units (303) are connected in parallel, and the outlet of the gas-fired boiler heating inlet pipe (301) is connected to the inlet of the gas-fired boiler unit (303). The inlet of the gas-fired boiler heating inlet pipe (301) is connected to the first energy storage supply pipe (11). The portion of the first energy storage supply pipe (11) located between the first reflux heating liquid pipe (7) and the gas boiler heating inlet liquid pipe (301) can form the second reflux heating liquid pipe. The gas boiler heating outlet liquid pipe (302) is connected to the gas boiler heating liquid pipe (9) and the energy storage module (5). The gas boiler heating outlet liquid pipe (302) is equipped with the boiler heating pump (304) and the heating switch valve (305). The heating switch valve (305) is communicatively connected to the heat meter (601). When the heating switch valve (305) is in the closed state, the gas boiler heating outlet pipe (302) is disconnected from the gas boiler heating inlet pipe (301). When the heating switch valve (305) is in the open state, the gas boiler heating outlet pipe (302) is connected to the gas boiler heating inlet pipe (301), so that the hot water output from the outlet of the first heating module (2) can flow along the diversion heating pipe (8) and the first energy storage supply pipe (11) to at least two of the gas boiler heating inlet pipes (301).

7. The multi-source coupled heating device according to claim 6, characterized in that, The energy storage module (5) is connected to the gas boiler heating liquid outlet pipe (302) near the energy storage module (5) by a diversion storage liquid pipe (10), and a third circulation drive pump (1001) is provided on the diversion storage liquid pipe (10). The third circulation drive pump (1001) can transfer a portion of the boiler hot water output from the outlet of the gas boiler heating liquid outlet pipe (302) to the energy storage module (5) to form the stored hot water. The remaining portion of the boiler hot water can be transported to the heat terminal (1) through the gas boiler heating liquid pipe (9).

8. The multi-source coupled heating device according to claim 6, characterized in that, A second electromagnetic two-way valve (1101) is provided on the first energy storage liquid supply pipe (11). The second electromagnetic two-way valve (1101) is communicatively connected to the heat meter (601), and the second electromagnetic two-way valve (1101) is located between the energy storage module (5) and the gas boiler heating liquid inlet pipe (301) near the energy storage module (5).

9. The multi-source coupled heating device according to claim 8, characterized in that, A third electromagnetic two-way valve (1102) is also provided on the first energy storage liquid supply pipe (11). The third electromagnetic two-way valve (1102) is communicatively connected to the heat meter (601). The third electromagnetic two-way valve (1102) is located on the first energy storage liquid supply pipe (11) between the first return heating liquid pipe (7) and the gas boiler heating liquid inlet pipe (301) which is close to the first return heating liquid pipe (7). The part of the first energy storage liquid supply pipe (11) located between the gas boiler heating liquid inlet pipe (301) and the energy storage module (5) can form the second energy storage liquid supply pipe. When the temperature of the hot water supplied is not up to standard, the third electromagnetic two-way valve (1102) is closed and the first electromagnetic two-way valve (801) is open, so that the second return heating liquid pipe is disconnected, the diversion heating liquid pipe (8) is connected, the first energy storage liquid supply pipe (11) is disconnected, and the second energy storage liquid supply pipe is connected. When the temperature of the hot water reaches the standard, the third electromagnetic two-way valve (1102) is in the open state, the first electromagnetic two-way valve (801) is in the closed state, so that the first return heating liquid pipe (7) is in the connected state, the second return heating liquid pipe is in the connected state, the diversion heating liquid pipe (8) is in the disconnected state, and the first energy storage supply pipe (11) is in the connected state. When the real-time temperature is outside the allowable critical temperature, the third electromagnetic two-way valve (1102) is in the open state, the first electromagnetic two-way valve (801) is in the closed state, and the control unit (14) is in the closed state, so that the first reflux heating liquid pipe (7) is in the disconnected state, the second reflux heating liquid pipe is in the connected state, the diversion heating liquid pipe (8) is in the disconnected state, and the second energy storage supply liquid pipe is in the connected state.

10. The multi-source coupled heating device according to claim 2, characterized in that, The heat exchange circulating liquid pipe (12) is provided with a second temperature and pressure sensor (1201) and a second circulation drive pump (1202), and the second temperature and pressure sensor (1201) is communicatively connected to the second circulation drive pump (1202).

11. The multi-source coupled heating device according to claim 1, characterized in that, The second heating module (4) is at least one of a solar heating module, a geothermal heating module, a biomass heating module, and an air source heat pump heating module.

12. A multi-source coupled heating method, characterized in that, The implementation using the multi-source coupled heating device according to any one of claims 1-11 includes the following steps: S1. Obtain the real-time temperature of the target area and compare the real-time temperature with the allowable critical temperature. If the real-time temperature is outside the range of the allowable critical temperature, proceed to step S2; otherwise, proceed to step S3. S2. Start the gas boiler unit (3), and the boiler hot water formed after being heated by the gas boiler unit (3) is delivered to the heat terminal (1). S3. Obtain the current temperature of the stored hot water in the energy storage module (5). If the current temperature of the stored hot water does not meet the standard, start the second heating module (4) to heat the stored hot water, and then proceed to step S4; otherwise, proceed directly to step S4. S4. Compare the real-time temperature with the target temperature. If the real-time temperature reaches the target temperature, proceed to step S5; otherwise, proceed to step S6. S5. The first heating module (2), the gas boiler unit (3) and the second heating module (4) are in standby mode; S6. Start the first heating module (2). The heated hot water formed by the first heating module (2) is transported to the heat terminal (1). At the same time, the stored hot water in the energy storage module (5) is transported to the first heating module (2). Determine whether the temperature of the heated hot water formed by the first heating module (2) meets the standard. If it does, proceed to step S7; otherwise, proceed to step S8. S7. Keep the first heating module (2) turned on and continuously supply heat to the target area through the first heating module (2); S8. Start the gas boiler unit (3) and transfer the hot water output from the first heating module (2) to the gas boiler unit (3) for reheating. At the same time, the stored hot water is transported to the gas boiler unit (3) and the boiler hot water formed after being heated by the gas boiler unit (3) is transferred to the heat terminal (1).

13. A multi-energy complementary coupled heating system, characterized in that, The system includes a control system and a multi-source coupled heating device as described in any one of claims 1-11, wherein the control system is connected to the multi-source coupled heating device.

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