Heat supply pipe network and photovoltaic coupling utilization device and using method thereof

Abstract

The invention discloses a heat supply pipe network and photovoltaic coupling utilization device and a use method thereof, and belongs to the research field of heat supply pipe network and photovoltaic energy coupling utilization, and the device comprises an energy storage controller, a cable, a heat exchange liquid box and heat exchange liquid; the energy storage controller is electrically connected with the photovoltaic panel and stores electric energy generated by the photovoltaic panel; the energy storage controller heats the heat exchange liquid tank buried underground through power transmission of a cable. The cable is electrically connected with an electric heating coil assembly arranged in the heat exchange liquid tank; the heat exchange liquid in the heat exchange liquid box is used for transferring heat to the heat supply pipe network. The device uses the energy storage controller to allocate the balance of electric energy supply and demand; the heat exchange liquid is heated in an electric heating mode, and then the heat supply pipe network is indirectly heated through the heat exchange pipe, so that the overheating phenomenon in the electric heating process can be reduced; the heat exchange device is buried underground, soil covering heat preservation can be utilized, energy waste during heat exchange in winter is reduced, and high practical value and wide application prospects are achieved.

Description

Technical Field

[0001] The present invention belongs to the technical field of heating pipe network, and specifically relates to a device for coupling utilization of a heating pipe network and photovoltaics and a method of using the device. Background Art

[0002] With the rapid development of the new energy industry, some heating companies have built a large number of rooftop distributed photovoltaic power generation. Since photovoltaic power generation is limited by natural resources, especially the intensity and duration of sunshine, photovoltaic power generation will drop sharply or even reach zero during low electricity consumption periods, such as at night or on rainy days. If the electricity generated at this time cannot be sold online in time, it will cause energy waste. In order to alleviate this problem, some companies are considering building energy storage battery systems to store electricity when there is sufficient sunlight and release it when demand peaks or there is insufficient sunlight. However, the investment cost of supporting the construction of energy storage batteries is high, and companies cannot recover their investment in the short term, so the cost performance is low. The high investment cost of energy storage batteries and the long investment payback period make this solution not economically feasible for most heating companies.

[0003] At the same time, heating companies face huge heating pressure in winter. During the winter heating period, heating companies need to increase the water temperature of the heating network to ensure the heating temperature in residents' homes. However, the heat exchanger of the heating network is prone to scaling or failure during long-term operation, which not only reduces the heat transmission efficiency, but also increases energy consumption and operating costs. In particular, when the heat exchanger of the heating network scales or fails, heat will be lost during the transmission process from the thermal power unit. Therefore, how to efficiently and stably increase the heating temperature has become an urgent problem for heating companies to solve.

[0004] In this context, by coupling the heating network with photovoltaic power, making full use of photovoltaic power that cannot be connected to the grid, efficiently converting it into thermal energy, and transmitting the heat to the heating network, raising the heating temperature is a multi-purpose task, which can not only reduce energy waste, but also improve heating efficiency and reduce operating costs. However, there are still many difficulties in this regard. The first is the way of heat transmission. Although electric heating is the simplest and most effective way, the water in the heating network has a certain alkalinity and hardness. During the heat transfer process, scaling may occur on the heat transfer surface, affecting the heat transfer effect. In order to solve this problem, it is necessary to develop more efficient and durable heat transfer materials and heat transfer methods to reduce the occurrence of scaling. Secondly, in the heating season, the external ambient temperature is low, and the antifreeze and heat preservation of the equipment is also one of the key factors affecting the stable operation of the system. If the equipment lacks effective antifreeze and heat preservation measures, it is easy to freeze and crack or performance degradation. Therefore, it is necessary to strengthen the antifreeze and heat preservation design of the equipment to ensure that it can still operate stably in a low temperature environment. Based on these problems, there is currently no mature integrated energy utilization system coupled with photovoltaic and heating network on the market. Summary of the invention

[0005] In order to solve the above problems in the prior art, the purpose of the present invention is to provide a device for utilizing energy by coupling heating pipe network and photovoltaic and its use method. The device can effectively utilize the electric energy that cannot be connected to the grid by distributed photovoltaic, convert the electric energy into heat energy, supplement the water temperature of the heating network during the extreme cold period, avoid resource waste, and improve energy efficiency.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solution: A device for coupling a heating network with photovoltaics, characterized in that it comprises: an energy storage controller, a cable, a heat exchange liquid tank and a heat exchange liquid; the energy storage controller is electrically connected to the photovoltaic panel to store the electric energy generated by the photovoltaic panel; the energy storage controller transmits electricity through the cable to heat the heat exchange liquid tank buried underground; the cable is electrically connected to the electric heating coil assembly arranged in the heat exchange liquid tank; the heat exchange liquid in the heat exchange liquid tank is used to transfer heat to the heating network.

[0007] As a further improvement of the present invention, the heat exchange fluid is desalted water or dimethyl silicone oil.

[0008] As a further improvement of the present invention, a plurality of stainless steel heat exchange tubes are further arranged in the heat exchange liquid tank; each stainless steel heat exchange tube is provided with fins corresponding to the flow direction of the heat exchange liquid tank, and the arrangement density of the stainless steel heat exchange tubes increases uniformly from the middle to the edge; the arrangement of the stainless steel heat exchange tubes increases in density from the middle to the edge; one end of the stainless steel heat exchange tube is connected to the heat exchange tube inlet pipe, and the other end is connected to the heat exchange tube outlet pipe.

[0009] As a further improvement of the present invention, the stainless steel heat exchange tube and the electric heating coil assembly are arranged relative to each other in a staggered manner.

[0010] As a further improvement of the present invention, a stirring device is provided at the bottom of the heat exchange liquid tank.

[0011] As a further improvement of the present invention, a plurality of temperature monitors are further arranged in the heat exchange liquid tank, wherein at least one temperature monitor is placed on one side of the electric heating coil assembly, and at least one temperature monitor is placed on one side of the stainless steel heat exchange tube.

[0012] As a further improvement of the present invention, a plurality of pressure monitors are further arranged in the heat exchange liquid tank, wherein at least one pressure monitor is placed on one side of the electric heating coil assembly, and at least one pressure monitor is placed on one side of the stainless steel heat exchange tube.

[0013] As a further improvement of the present invention, a heat exchange liquid injection pipe and a heat exchange liquid replacement pipe are arranged in pairs on the top of the heat exchange liquid tank, and the opening and closing are controlled by a heat exchange liquid injection valve and a heat exchange liquid replacement pipe valve respectively.

[0014] As a further improvement of the present invention, a state monitoring tube is also provided in the heat exchange liquid tank.

[0015] A method for using a device for coupling a heating network with photovoltaics in the present invention includes: photovoltaic panels convert light energy into electrical energy, which is collected by an energy storage controller and supplied to an electric heating coil assembly according to demand; the electric heating coil assembly heats the heat exchange fluid to a predetermined temperature and outputs the heat to the heating network.

[0016] Compared with the prior art, the present invention has the following advantages: The present invention discloses a device for coupling a heating network with photovoltaics. The device utilizes the electric energy generated by photovoltaics and collects it through an energy storage controller to adjust the balance between supply and demand. The heat exchange fluid is heated by electric heating, and then the heating network is indirectly heated by heat exchange pipes, thereby reducing overheating during the electric heating process. The heat exchange device is buried underground and can be covered with soil for insulation, thereby reducing energy waste during heat exchange in winter.

[0017] Furthermore, the heat exchange fluid uses desalted water or dimethyl silicone oil. Both media have good chemical stability and thermal stability, and will not cause scaling or material corrosion problems, which can improve the efficiency and stability of the device operation.

[0018] Furthermore, the stainless steel heat exchange tube has good corrosion resistance and thermal conductivity, which can be used to improve the efficiency of heat exchange between the heat exchange device and the heating network. The fins corresponding to the flow direction of the heat exchange liquid tank can further improve the heat exchange efficiency and avoid hindering the flow of the heat exchange liquid. The arrangement of the stainless steel heat exchange tube increases in density from the middle to the edge, which facilitates the uniform distribution and effective transfer of heat.

[0019] Furthermore, the stainless steel heat exchange tubes and the electric heating coil assembly are arranged in a staggered manner to ensure uniform distribution of heat in the heat exchange liquid tank and effective use of space to reserve heat.

[0020] Furthermore, a stirring device is provided at the bottom of the heat exchange liquid tank to promote the circulation and mixing of the heat exchange liquid and improve the heat exchange efficiency.

[0021] Furthermore, the temperature monitors installed in the heat exchange liquid tank are respectively placed on one side of the electric heating coil assembly and the stainless steel heat exchange tube, and are used to monitor the temperature of the device in real time to ensure safe operation; the temperature difference on both sides of the electric heating coil assembly and the stainless steel heat exchange tube can be used to guide and control the speed of the agitator to improve the heat exchange efficiency.

[0022] Furthermore, the pressure monitors installed in the heat exchange liquid tank are placed on one side of the electric heating coil assembly and the stainless steel heat exchange tube, respectively, to monitor the temperature of the device in real time to ensure safe operation; the pressure difference on both sides of the electric heating coil assembly and the stainless steel heat exchange tube can be used to guide and control the speed of the agitator to improve the heat exchange efficiency.

[0023] Furthermore, a heat exchange liquid injection pipe and a heat exchange liquid replacement pipe are arranged in pairs on the top of the heat exchange liquid tank for adding and replacing the heat exchange liquid; the heat exchange liquid can also be completely discharged by injecting nitrogen, and filled with nitrogen for corrosion protection during the idle period.

[0024] Furthermore, a status monitoring tube is provided in the heat exchange liquid tank and can be connected to a conductivity meter or a water content meter to measure the status of the heat exchange liquid and determine whether the heat exchange liquid needs to be replaced. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic longitudinal section diagram of a device for coupling utilization of a heating pipe network and photovoltaics according to the present invention; Figure 2 A top view of a device for coupling a heating pipe network with photovoltaics according to the present invention; Figure 3 It is a schematic longitudinal section diagram of a device of a stainless steel heat exchange tube of the present invention; Among them, 1. photovoltaic panel; 2. photovoltaic panel; 3. heat exchange liquid replacement pipeline valve; 4. heat exchange liquid injection pipeline valve; 5. cable; 6. energy storage controller; 7. heat exchange liquid replacement pipeline; 8. heat exchange liquid injection pipeline; 9. electric heating coil assembly; 10. stainless steel heat exchange tube; 11. photovoltaic panel; 12. heat exchange liquid; 13. photovoltaic cable; 14. stirring device; 15. first temperature monitor; 16. second temperature monitor; 17. heat exchange tube inlet pipeline; 18. heat exchange liquid tank; 19. first pressure monitor; 20. second pressure monitor; 21. status monitoring tube; 22. heat exchange tube outlet pipeline; 23. fin. DETAILED DESCRIPTION In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0026] It should be noted that when an element is referred to as being "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only embodiment.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0028] Example 1 like Figure 1 As shown, the present invention provides a device for coupling a heating network with photovoltaics, comprising an energy storage controller 6, a cable 5, a heat exchange liquid tank 18 and a heat exchange liquid 12; the energy storage controller 6 is electrically connected to the photovoltaic panels 1, 2, 11 to store the electric energy generated by the photovoltaic panels; the energy storage controller 6 transmits electricity through the cable 5 to heat the heat exchange liquid tank 18 placed underground; the cable 5 is electrically connected to the electric heating coil assembly 9 provided in the heat exchange liquid tank 18; the heat exchange liquid 12 in the heat exchange liquid tank 18 is used to access the heating network to provide heat.

[0029] The energy storage controller 6 is the core of power management and distribution, ensuring the stable supply and efficient use of power. The cable 5 is the medium for power transmission, transmitting the power in the energy storage controller to the electric heating coil assembly 9 in the underground heat exchange liquid tank. The selection of cables should take into account their high temperature resistance, corrosion resistance and safety performance.

[0030] The heat exchange liquid tank 18 is made of carbon steel and has a rectangular structure. It is buried less than 3 meters underground and can be covered with soil for insulation, reducing energy waste during heat exchange in winter. The heat exchange liquid 12 uses desalted water. Desalted water refers to the finished water obtained by removing suspended matter, colloids, and inorganic cations, anions and other impurities in water through various water treatment processes; the conductivity of water can be measured by a conductivity meter, and the purity of water can be measured by the conductivity of water. Therefore, a state monitoring tube 21 is set in the heat exchange liquid tank 18, which can be connected to a conductivity meter or a moisture content meter to measure the state of the heat exchange liquid 12 and determine whether the heat exchange liquid 12 needs to be replaced. The state monitoring tube 21 can also be used to monitor the color and transparency of the heat exchange liquid 12, providing an important reference for the maintenance and management of the device.

[0031] The heat exchange liquid tank 18 also includes a reciprocating electric heating coil assembly 9, which is used to further increase the heat exchange area and improve the heat exchange efficiency. Figure 2 As shown, the stainless steel heat exchange tube 10 and the electric heating coil assembly 9 are arranged in a staggered manner to avoid mutual interference, and to make full use of the heat storage space in the heat exchange liquid tank 18 to improve the uniformity and stability of heat exchange. One end of the stainless steel heat exchange tube 10 is connected to the heat exchange tube inlet pipe 17, and the other end is connected to the heat exchange tube outlet pipe 22, which is used to connect to the heating network to provide heat.

[0032] The heat exchange liquid tank 18 also includes a stirring device 14 at the bottom, which is used to promote the circulation and mixing of the heat exchange liquid 12 and improve the heat exchange efficiency. The stirring device 14 can be electrically connected to the energy storage controller 6, and its start and stop and speed are controlled by the energy storage controller 6. When the energy storage controller 6 continues to supply power to the electric heating coil assembly 9, the stirring device 14 can be turned on and the speed can be increased as needed; when the energy storage controller 6 stops supplying power to the electric heating coil assembly 9, the speed can be gradually reduced until the stirring device 14 is turned off.

[0033] Several temperature monitors are arranged in the heat exchange liquid tank 18, wherein the first temperature monitor 15 is placed on one side of the electric heating coil assembly 9, and the second temperature monitor 16 is placed on one side of the stainless steel heat exchange tube 10. The temperature monitors 15 and 16 are used to monitor the temperature of the device in real time to ensure the safety of operation; the temperature difference between the electric heating coil assembly 9 and the stainless steel heat exchange tube 10 can be used to guide the control of the rotation speed of the agitator 14 to improve the heat exchange efficiency. The present invention can also be equipped with a control device, which automatically controls the output of the energy storage controller 6 and the opening and closing and rotation speed of the agitator 14 according to the monitored temperature difference data between the electric heating coil assembly 9 and the stainless steel heat exchange tube 10, combined with the real-time weather, heating demand and energy storage status, and adjusts the flow rate of the heat exchange medium in the stainless steel heat exchange tube 10 to achieve accurate heat supply and regulation to improve energy utilization efficiency.

[0034] Example 2 like Figure 1-2 As shown, the present invention provides a device for coupling heating pipe network and photovoltaic, including energy storage controller 6, cable 5, heat exchange liquid tank 18 and heat exchange liquid 12; the energy storage controller 6 is electrically connected to photovoltaic panels 1, 2, 11 by photovoltaic cables 13, and stores the electric energy generated by photovoltaic panels; the energy storage controller 6 transmits electricity through cable 5 to heat the heat exchange liquid tank 18 placed underground; the cable 5 is electrically connected to the electric heating coil assembly 9 set in the heat exchange liquid tank 18; the heat exchange liquid 12 in the heat exchange liquid tank 18 is used to connect to the heating pipe network to provide heat. The electric heating coil assembly 9 and the stainless steel heat exchange tube 10 adopt advanced welding and sealing technology to ensure no leakage and long-term stable operation.

[0035] The heat exchange fluid 12 uses dimethyl silicone oil. Dimethyl silicone oil has excellent chemical stability, high temperature stability, low toxicity, low corrosiveness, non-volatility and non-oxidation characteristics, so it is selected as a heat transfer medium. The heat exchange fluid 12 can also use a new type of high-efficiency heat exchange fluid, such as nanofluid or phase change material, to improve the heat exchange efficiency and heat energy transfer speed.

[0036] The heat exchange liquid tank 18 also includes a reciprocating electric heating coil assembly 9, which is used to further increase the heat exchange area and improve the heat exchange efficiency. Figure 2As shown, the stainless steel heat exchange tube 10 and the electric heating coil assembly 9 are arranged in a staggered manner to avoid mutual interference, and to make full use of the heat storage space in the heat exchange liquid tank 18 to improve the uniformity and stability of heat exchange. The heat exchange liquid tank 18 can also optimize the internal design and adopt a multi-stage heat exchange structure to increase the heat exchange area and reduce heat loss. Figure 3 As shown, each stainless steel heat exchange tube 10 is provided with fins 23 in a direction corresponding to the flow direction of the heat exchange liquid tank, and the fins can increase the heat exchange area; the flow direction is up and down, and the direction of the fins corresponds to the flow direction in the heat exchange liquid tank, which helps to increase the flow rate and enhance the heat exchange efficiency. The arrangement of the stainless steel heat exchange tube 10 can increase the density from the middle to the edge, with looseness in the middle and denseness at the edge, which is convenient for uniform distribution and effective transfer of heat, and avoids the reduction of heat exchange efficiency caused by excessive concentration of heat accumulation. One end of the stainless steel heat exchange tube 10 is connected to the heat exchange tube inlet pipe 17, and the other end is connected to the heat exchange tube outlet pipe 22, which is used to connect to the heating network to provide heat.

[0037] The heat exchange liquid tank 18 also includes a stirring device 14 disposed at the bottom for promoting the circulation and mixing of the heat exchange liquid 12 and improving the heat exchange efficiency.

[0038] Several pressure monitors are arranged in the heat exchange liquid tank 18, wherein the first pressure monitor 19 is arranged on one side of the electric heating coil assembly 9, and the second pressure monitor 20 is arranged on one side of the stainless steel heat exchange tube 10. The pressure monitors 19 and 20 are used to monitor the pressure of the device in real time to ensure the safety of operation; the pressure difference between the electric heating coil assembly 9 and the stainless steel heat exchange tube 10 can be used to guide and control the rotation speed of the agitator 14 to improve the heat exchange efficiency.

[0039] Example 3 The present invention provides a method for using a device for coupling a heating pipe network with photovoltaics, comprising: The photovoltaic panel converts light energy into electrical energy, which is collected by the energy storage controller 6 and supplied to the electric heating coil assembly 9 according to demand. The electric heating coil assembly 9 heats the heat exchange fluid 12 to a predetermined temperature and outputs the heat to the heating network.

[0040] When the heat exchange liquid 12 needs to be injected, the heat exchange liquid injection pipe valve 4 is opened, and the heat exchange liquid tank 18 is injected through the heat exchange liquid injection pipe 8; when the heat exchange liquid 12 needs to be discharged, the heat exchange liquid injection pipe valve 4 is opened, dry nitrogen is injected through the heat exchange liquid injection pipe 8, and the heat exchange liquid displacement pipe valve 3 is opened. Relying on the gas pressure, the heat exchange liquid 12 is squeezed out of the heat exchange liquid tank 18 through the heat exchange liquid displacement pipe 7. In summer and other times when the heating network does not need heat exchange, dry nitrogen can be used to inject the heat exchange liquid tank 18 from the heat exchange liquid injection pipe 8, and the heat exchange liquid 12 in the heat exchange liquid tank 18 can be discharged from the device. During the idle period, the device can be anti-corroded by filling it with nitrogen. After the heat exchange liquid 12 is discharged, the nitrogen injected provides physical support for the heat exchange liquid tank 18 to prevent it from being crushed by the covering soil.

[0041] When demineralized water is used as the heat exchange fluid 12, the conductivity of the demineralized water can be monitored by the status monitoring tube 21. For demineralized water, its conductivity is usually very low because the ion content in the water is very low. However, when the dissolved salt or other conductive substances in the heat exchange fluid increase, the conductivity will increase accordingly, which usually means that sediments, corrosion products or other impurities begin to accumulate in the heat exchange fluid. When the conductivity exceeds 10μS / cm, the heat exchange fluid 12 needs to be replaced, and the following liquid replacement method can be used to prevent the accumulation of sediments and corrosion products.

[0042] First, ensure that there is a sufficient amount of fresh, qualified desalted water as the new heat exchange fluid. Then, before replacement, the device needs to be shut down and the relevant power and fluid supply must be cut off. Next, open the hot liquid replacement pipeline valve 3 of the device and discharge the old heat exchange fluid into the designated collection container. Then, use appropriate cleaning agents and tools to clean the heat exchange liquid tank 18 to remove residual sediment and corrosion. Next, inject the prepared new desalted water from the heat exchange liquid injection pipeline valve 4 into the heat exchange liquid tank 18 until the specified liquid level is reached. Finally, after confirming that the heat exchange liquid tank 18 has been thoroughly cleaned and injected with new liquid, restart the device and perform necessary debugging and inspection to ensure its normal operation. After the replacement is completed, continue to monitor the conductivity of the heat exchange liquid through the status monitoring tube 21 to ensure that it remains within the specified range.

[0043] Many embodiments and many applications beyond the examples provided will be apparent to those skilled in the art upon reading the above description. Therefore, the scope of the present teachings should not be determined with reference to the above description, but rather with reference to the preceding claims and the full scope of equivalents to which such claims are entitled. For the purpose of comprehensiveness, all articles and references, including disclosures of patent applications and publications, are incorporated herein by reference. The omission of any aspect of the subject matter disclosed herein in the preceding claims is not intended to be a disclaimer of such subject matter, nor should it be considered that the applicants did not consider such subject matter to be part of the disclosed inventive subject matter.

[0044] The above content is a further detailed description of the present invention. It cannot be determined that the specific implementation methods of the present invention are limited to these. For ordinary technicians in the technical field to which the present invention belongs, without departing from the concept of the present invention, they can also make several simple deductions or substitutions, which should be regarded as belonging to the protection scope of the present invention determined by the submitted claims.

Claims

1. A device for coupling heating pipe network with photovoltaics, It is characterized in that include: An energy storage controller (6), a cable (5), a heat exchange liquid tank (18), and a heat exchange liquid (12); the energy storage controller (6) is electrically connected to a photovoltaic panel to store electric energy generated by the photovoltaic panel; the energy storage controller (6) transmits electricity through the cable (5) to heat a heat exchange liquid tank (18) buried underground; the cable (5) is electrically connected to an electric heating coil assembly (9) disposed in the heat exchange liquid tank (18); and the heat exchange liquid (12) in the heat exchange liquid tank (18) is used to transfer heat to a heating network.

2. A device for coupling heating pipe network and photovoltaics according to claim 1, It is characterized in that The heat exchange fluid (12) is desalted water or dimethyl silicone oil.

3. A device for coupling heating pipe network and photovoltaics according to claim 1, It is characterized in that A plurality of stainless steel heat exchange tubes (10) are also arranged in the heat exchange liquid tank (18); each stainless steel heat exchange tube (10) is provided with fins (23) whose direction corresponds to the flow direction of the heat exchange liquid tank, and the arrangement density of the stainless steel heat exchange tubes (10) increases uniformly from the middle to the edge; one end of the stainless steel heat exchange tube (10) is connected to a heat exchange tube inlet pipe, and the other end is connected to a heat exchange tube outlet pipe.

4. A device for coupling heating pipe network and photovoltaics according to claim 3, It is characterized in that The stainless steel heat exchange tube (10) and the electric heating coil assembly (9) are arranged relative to each other in a staggered manner.

5. The device for coupling heating pipe network and photovoltaics according to claim 1, It is characterized in that A stirring device (14) is provided at the bottom of the heat exchange liquid tank (18).

6. The device for coupling heating pipe network and photovoltaics according to claim 4, It is characterized in that A plurality of temperature monitors (16) are also arranged in the heat exchange liquid tank (18), wherein at least one temperature monitor (15) is placed on one side of the electric heating coil assembly (9), and at least one temperature monitor (16) is placed on one side of the stainless steel heat exchange tube (1).

7. The device for coupling heating pipe network and photovoltaics according to claim 4, It is characterized in that A plurality of pressure monitors are also arranged in the heat exchange liquid tank (18), wherein at least one pressure monitor (19) is placed on one side of the electric heating coil assembly (9), and at least one pressure monitor (20) is placed on one side of the stainless steel heat exchange tube (1).

8. The device for coupling heating pipe network and photovoltaics according to claim 1, It is characterized in that A heat exchange liquid injection pipe (8) and a heat exchange liquid displacement pipe (7) are arranged in pairs on the top of the heat exchange liquid tank (18), and the opening and closing are controlled by a heat exchange liquid injection valve (4) and a heat exchange liquid displacement pipe valve (3) respectively.

9. The device for coupling heating pipe network and photovoltaics according to claim 1, It is characterized in that A state monitoring tube (21) is also provided in the heat exchange liquid tank (18).

10. A method for using a device for coupling a heating network with photovoltaic power generation according to claims 1 to 9, include: The photovoltaic panel converts light energy into electrical energy, which is collected by the energy storage controller (6) and supplied to the electric heating coil assembly (9) according to demand. The electric heating coil assembly (9) heats the heat exchange fluid (12) to a predetermined temperature and outputs the heat to the heating network.

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