A water circulation system and method for solar water heater

Abstract

The present application discloses a water circulation system and method for a solar water heater, belonging to the technical field of utilizing solar energy for heating. The system comprises: a heat collection module, a water storage module, a water circulation module and an intelligent control module. The heat collection module is used to convert solar energy into thermal energy when working, the water storage module is used to store hot water, the water circulation module comprises a circulating water pump and a circulating pipeline, which are used to complete the conversion of cold and hot water and the circulation process of hot water, the intelligent control module is used to monitor the water temperature and flow rate, and can automatically adjust the operating state of the circulating water pump and optimize the water flow path; the present invention improves the water circulation efficiency and enhances the thermal energy utilization rate of the water heater by intelligently controlling and automatically adjusting the operation of the circulating pump through the intelligent control module; secondly, the system can optimize the water flow path according to the real-time water temperature and flow rate data, ensure the uniform distribution and rapid supply of hot water, and improve the user experience.

Description

Technical Field

[0001] The invention relates to the technical field of utilizing solar energy for heating, and in particular to a water circulation system and method for a solar water heater. Background Art

[0002] As the global energy crisis intensifies and environmental protection becomes more important, solar energy as a clean and renewable energy source has received widespread attention. Solar water heaters are typical devices that utilize solar energy. They can convert solar energy into thermal energy to heat water to meet the hot water needs of households or industries. Against the backdrop of the gradual shortage of traditional energy and the environmental pollution caused by its use, the market demand for solar water heaters continues to increase.

[0003] Traditional storage electric water heaters have the problem of high energy consumption. It heats the water in the water tank through electric heating elements. The efficiency of converting electrical energy into thermal energy is relatively low, and it needs to continuously consume electrical energy to maintain the water temperature during use. In addition, the water tank capacity is limited, and if the water consumption is large, there may be insufficient hot water supply.

[0004] Therefore, there is an urgent need for a technology to replace the existing storage type electric water heater to heat the water in the water tank through the electric heating element, so as to solve the problem of how to improve the thermal energy conversion efficiency, enhance the thermal energy utilization rate of the water heater, and reduce energy waste and system operating costs. Summary of the invention

[0005] The embodiment of the present application provides a water circulation system and method for a solar water heater, which is used to solve the problem of how to improve the heat energy conversion efficiency, enhance the heat energy utilization rate of the water heater, and reduce energy waste and system operation cost in the related art.

[0006] According to one aspect of the embodiment of the present application, a water circulation system for a solar water heater is provided, comprising: a heat collection module, a water storage module, a water circulation module and an intelligent control module;

[0007] When the heat collection module is working, it completes the conversion of solar energy into thermal energy;

[0008] The water storage module uses a heat preservation structure to store and keep hot water warm;

[0009] The water circulation module comprises a circulating water pump and a circulating pipe, wherein the circulating water pump is used to transport cold water to the heat collection module and to make hot water flow in the circulating pipe overcoming the circulation resistance, and the circulating pipe is used to maintain water circulation;

[0010] The intelligent control module is used to monitor the water temperature and flow rate of hot water in the circulation pipeline, and the intelligent control system can automatically adjust the operating state of the circulation pump;

[0011] The intelligent control module monitors the temperature through the temperature sensor on the circulation pipe and sets a temperature threshold X. The intelligent control module compares the monitored water temperature of the hot water in the circulation pipe and the water temperature in the water storage tank with the set temperature threshold X, and the temperature of the circulation pipe is set to L;

[0012] If the circulation pipe temperature L < threshold value X, start the circulation pump;

[0013] If the circulation pipe temperature L ≥ threshold value X, the circulation pump will not be started;

[0014] During the operation of the circulating water pump, the intelligent control module monitors the flow rate through the flow sensor on the circulating pipe, sets the flow rate threshold range Z, and compares the monitored flow rate in the circulating pipe with the set flow rate threshold range Z, and sets the circulating pipe flow rate to K;

[0015] If the circulating pipe flow K is less than the set flow threshold range Z, the intelligent control module first determines whether there is a problem with the circulating water pump itself. If there is a problem with the circulating water pump, a fault alarm is issued; if there is no problem with the circulating water pump, the intelligent control module increases the speed of the circulating water pump;

[0016] If the circulation pipeline flow K> the set flow threshold range Z, the intelligent control system will reduce the speed of the circulation pump.

[0017] Furthermore, the solar water heater uses a water circulation system, and the intelligent control module can collect and monitor the temperature data of the heat collection module and the solar radiation intensity through the light sensor, and calculate the heat collection efficiency of the heat collection module according to the temperature data. The calculation formula of the heat collection efficiency is:

[0018]

[0019] Where η is the collector efficiency;

[0020] Q u It is the useful heat absorbed by the collector;

[0021] G t is the total solar radiation intensity;

[0022] A is the daylighting area of ​​the collector;

[0023] The intelligent control module can automatically adjust the angle and direction of the heat collection module according to the heat collection efficiency of the heat collection module.

[0024] Furthermore, the solar water heater uses a water circulation system, the water storage module includes a water replenishment unit, the intelligent control module monitors the water level in the water storage module in real time through a water level sensor, sets a water level lower limit N, if the water level drops to the set lower limit N, the intelligent control module controls the water replenishment unit to replenish the water storage module, sets a water level upper limit M, if the water level drops to the set upper limit M, the water replenishment unit stops replenishing water.

[0025] Furthermore, the solar water heater uses a water circulation system, and the water storage module also includes a cleaning unit. A cleaning interval time h is set. After the cleaning interval time h is reached, the intelligent control module cuts off the connection between the circulation pipe and the storage module, discharges the hot water in the storage module, and starts the cleaning unit. After the cleaning is completed, the controller opens the drain port to discharge the sewage, and then rinses multiple times until the water quality meets the requirements, and finally restores the normal working state of the water storage module.

[0026] Furthermore, the solar water heater uses a water circulation system, and the heat collection module and the water storage module include several groups and are arranged in parallel. Each collector or water storage tank works independently, and the water flow is flexibly distributed according to the hot water demand of different areas.

[0027] Furthermore, the solar water heater uses a water circulation system, and the circulation pipeline includes a regulating valve, and the regulating valve is distributed at the pipeline nodes and branch pipelines of the circulation pipeline. According to actual needs, the intelligent control module accurately controls the regulating valve to adjust the size and speed of the water flow.

[0028] Furthermore, the solar water heater uses a water circulation system, and the intelligent control module includes a neural network structure that establishes a mapping relationship between input parameters and control outputs by learning a large amount of input-output data. The neural network adjusts the connection weights between neurons according to a given training algorithm so that for a given input, the output can be as close to the expected target output as possible.

[0029] Furthermore, the solar water heater uses a water circulation system, and the intelligent control module can also be connected to the user's mobile device. The user can view the operating status of the solar water heater system in real time through the mobile device, including information on water temperature, water level, and circulating pump operating status, and can remotely control the intelligent control module to operate the system.

[0030] Furthermore, the solar water heater uses a water circulation system, and a pressure sensor is arranged on the circulation pipeline. The intelligent control module monitors the pressure in the pipeline in real time and sets a safety range C. When the pressure exceeds the set safety range C, the intelligent control module automatically adjusts the speed of the circulation pump. If the intelligent control module cannot reduce the pressure by adjusting the speed of the circulation pump, the intelligent control module will immediately shut down the circulation water pump and issue an alarm to notify the user to conduct inspection and maintenance.

[0031] According to another aspect of the embodiment of the present application, a water circulation method for a solar water heater is provided, comprising the following steps:

[0032] S100: The heat collection module works under sunlight, converting solar energy into thermal energy to heat the water in the heat collection module;

[0033] S200; the circulating water pump transfers the heated hot water in the heat collection module to the circulating water channel;

[0034] S300: The intelligent control module monitors various parameters of the flowing water in the circulation pipe in real time through sensors on the circulation pipe;

[0035] S400: the intelligent control module adjusts the circulating water pump and the regulating valve according to the parameter data of the flowing water;

[0036] S500: There are several groups of heat collector modules and water storage modules and they are arranged in parallel. Each collector or water storage tank works independently and the water flow is flexibly distributed according to the hot water demand in different areas.

[0037] S600: The intelligent control module records the time, and when the set cleaning interval is reached, the water tank cleaning operation is performed;

[0038] S700: Users connect to the intelligent control module through mobile devices to view the operating status of the solar water heater system in real time, including information on water temperature, water level, and circulating pump operating status.

[0039] Compared with the prior art, the present invention has the following beneficial effects:

[0040] 1. Through the coordinated cooperation of various modules and the effective operation of the intelligent control module, the water circulation system realizes the high efficiency, stability and intelligence of the hot water circulation of the solar water heater, improves the quality of hot water supply and the operational reliability of the system, and is also energy-saving and easy to maintain.

[0041] 2. The water storage module uses an insulation structure to store and insulate hot water, which can effectively reduce the heat loss of hot water during the storage process, ensuring that users have a supply of hot water of sufficient temperature when they need it, thereby improving the availability and convenience of hot water.

[0042] The technical solution of the present application is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] The accompanying drawings, which constitute a part of the specification, illustrate embodiments of the present application and, together with the description, serve to explain the principles of the present application.

[0044] The present application can be more clearly understood from the following detailed description with reference to the accompanying drawings, in which:

[0045] Figure 1 A structural block diagram of a water circulation system for a solar water heater provided in an embodiment of the present application is shown;

[0046] Figure 2 The present invention shows a flowchart of a water circulation method for a solar water heater provided in an embodiment of the present application. DETAILED DESCRIPTION

[0047] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present application.

[0048] At the same time, it should be understood that for the convenience of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship.

[0049] The following description of at least one exemplary embodiment is merely illustrative in nature and is not intended to limit the present application, its application, or uses.

[0050] Technologies, systems, and devices known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, such technologies, systems, and devices should be considered part of the specification.

[0051] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0052] In addition, the technical solutions between the various embodiments of the present application can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0053] It should be noted that all directional indications in the embodiments of the present application (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0054] Combine the following Figure 1 - Figure 2 To describe a water circulation system and method for a solar water heater according to an exemplary embodiment of the present application. It should be noted that the following application scenarios are only shown to facilitate understanding of the spirit and principle of the present application, and the embodiments of the present application are not limited in this regard. On the contrary, the embodiments of the present application can be applied to any applicable scenario.

[0055] Furthermore, the present application proposes a water circulation system for a solar water heater.

[0056] Figure 1 The structure block diagram of a water circulation system for a solar water heater according to an embodiment of the present application is schematically shown. Figure 1 As shown, including:

[0057] Heat collection module, water storage module, water circulation module and intelligent control module;

[0058] When the heat collection module is working, it completes the conversion of solar energy into thermal energy;

[0059] The water storage module uses a thermal insulation structure to store and keep hot water warm;

[0060] The water circulation module includes a circulating water pump and a circulating pipe. The circulating water pump is used to transport cold water to the heat collection module and to make hot water overcome the circulation resistance and flow in the circulating pipe. The circulating pipe is used to maintain water circulation.

[0061] The intelligent control module is used to monitor the water temperature and flow rate of hot water in the circulation pipeline, and the intelligent control system can automatically adjust the operating status of the circulation pump;

[0062] The intelligent control module monitors the temperature through the temperature sensor on the circulation pipe and sets the temperature threshold X. The intelligent control module compares the monitored water temperature of the hot water in the circulation pipe and the water temperature in the water storage tank with the set temperature threshold X, and the temperature of the circulation pipe is set to L;

[0063] If the circulation pipe temperature L < threshold value X, start the circulation pump;

[0064] If the circulation pipe temperature L ≥ threshold value X, the circulation pump will not be started;

[0065] When the circulating water pump is working, the intelligent control module monitors the flow rate through the flow sensor on the circulating pipe and sets the flow threshold range Z. The intelligent control module compares the monitored flow rate in the circulating pipe with the set flow threshold range Z, and the circulating pipe flow rate is set to K;

[0066] If the circulating pipe flow K is less than the set flow threshold range Z, the intelligent control module will first determine whether there is a problem with the circulating water pump itself. If there is a problem with the circulating water pump, a fault alarm will be issued; if it is not a problem with the circulating water pump, the intelligent control module will increase the speed of the circulating water pump;

[0067] If the circulation pipeline flow K> the set flow threshold range Z, the intelligent control system will reduce the speed of the circulation pump.

[0068] Specifically, the preparation work, each module is ready, and the intelligent control module sets the parameter threshold. The solar collector module receives solar energy, converts solar energy into thermal energy, and heats the water in the collector. The intelligent control module continuously monitors the water temperature of the hot water in the circulation pipeline and the water temperature in the water storage tank through the temperature sensor on the circulation pipeline, and compares it with the set temperature threshold X. When the circulation pipeline temperature meets the conditions to start the circulation pump, the circulation water pump starts to work, transporting cold water to the solar collector module, and at the same time allowing the hot water to overcome the circulation resistance and flow in the circulation pipeline.

[0069] Specifically, if the circulating pipe flow K exceeds the set flow threshold range Z: the intelligent control module first determines whether there is a problem with the circulating water pump itself. If there is a problem with the circulating water pump, a fault alarm will be issued to remind the user or maintenance personnel to perform maintenance. If it is not a problem with the circulating water pump, the intelligent control module will increase the speed of the circulating water pump to increase the water flow and restore it to the normal range as soon as possible.

[0070] It is understandable that during the operation of the circulating water pump, the intelligent control module adjusts the pump speed based on the monitoring of the circulating pipe flow. If the circulating pipe flow K exceeds the set flow threshold range Z, first determine whether there is a problem with the water pump itself. If so, issue a fault alarm in time for maintenance. If not, increase the speed to ensure that hot water can circulate quickly at an appropriate flow rate to meet the hot water supply demand; if K is below the set flow threshold range Z, reducing the speed can further save electricity on the basis of meeting the hot water circulation, realizing intelligent and precise adjustment of the pump speed according to actual conditions, making the water circulation more stable and efficient.

[0071] Specifically, the solar water heater uses a water circulation system. The intelligent control module can collect and monitor the temperature data of the heat collection module and the solar radiation intensity through the light sensor, and calculate the heat collection efficiency of the heat collection module based on the temperature data. The calculation formula for the heat collection efficiency is:

[0072]

[0073] Where η is the collector efficiency;

[0074] Q u It is the useful heat absorbed by the collector;

[0075] G t is the total solar radiation intensity;

[0076] A is the daylighting area of ​​the collector;

[0077] The intelligent control module can automatically adjust the angle and direction of the heat collection module according to the heat collection efficiency of the heat collection module.

[0078] Specifically, the position of the sun changes at different times and seasons. By automatically adjusting the angle and direction of the solar collector module, the solar collector module can always be aligned with the sun to the greatest extent possible, ensuring that more solar radiation is received, thereby significantly improving the heat collection efficiency. For example, at noon when the sun is at a high altitude, adjusting the solar collector module to be perpendicular to the sun's rays can maximize the absorption of solar energy; and in the morning or evening when the sun is at a lower angle, adjusting the angle accordingly can ensure that the solar collector module can still collect solar energy efficiently.

[0079] Specifically, the solar water heater uses a water circulation system, and the water storage module includes a water replenishment unit. The intelligent control module monitors the water level in the water storage module in real time through a water level sensor and sets a lower limit value N of the water level. If the water level drops to the set lower limit value N, the intelligent control module controls the water replenishment unit to replenish the water storage module. The water level upper limit value M is set. If the water level drops to the set upper limit value M, the water replenishment unit stops replenishing water.

[0080] Specifically, when the intelligent control module detects in real time through the water level sensor that the water level in the water storage module has dropped to the set lower limit value N, it controls the water replenishment unit to replenish water to the water storage module. This function ensures that during the use of hot water, even if the water level drops due to continuous water use, the water source can be replenished in time to ensure the continuity of hot water supply. Users do not need to worry about the sudden shortage of hot water during the use of water, which improves the user experience.

[0081] Specifically, the solar water heater uses a water circulation system, and the water storage module also includes a cleaning unit. The cleaning interval time h is set. After the cleaning interval time h is reached, the intelligent control module cuts off the connection between the circulation pipe and the storage module, discharges the hot water in the storage module, and starts the cleaning unit. After the cleaning is completed, the controller opens the drain port to discharge the sewage, and then rinses multiple times until the water quality meets the requirements, and finally restores the normal working state of the water storage module.

[0082] It is understandable that various impurities, scale, etc. will accumulate in the water storage module over time, affecting the quality of hot water. By setting the cleaning interval h and regularly starting the cleaning unit, these impurities and scale can be effectively removed to ensure the clean water quality of the hot water in the water storage module. When users use clean hot water, it is not only healthier and safer, but also avoids skin irritation or damage to pipes, appliances, etc. caused by water quality problems.

[0083] Specifically, the solar water heater uses a water circulation system. The heat collection module and the water storage module include several groups and adopt a parallel layout. Each collector or water storage tank works independently and flexibly distributes water flow according to the hot water demand in different areas.

[0084] It is understandable that the parallel connection of water storage modules allows hot water to be distributed nearby according to demand, reducing the energy loss of long-distance transmission of hot water in pipelines. Moreover, different water storage modules can store hot water of appropriate temperature and flow rate according to the hot water usage habits in their areas, avoiding overheating or storing unnecessary hot water, thereby further improving energy efficiency.

[0085] Specifically, the solar water heater uses a water circulation system, and the circulation pipeline includes regulating valves. The regulating valves are distributed at the pipeline nodes and branch pipelines of the circulation pipeline. According to actual needs, the intelligent control module accurately controls the regulating valves to adjust the size and speed of the water flow.

[0086] It is understandable that when a large amount of hot water is not needed, reducing the water flow by adjusting the valve can reduce unnecessary consumption of hot water.

[0087] Specifically, the solar water heater uses a water circulation system, and the intelligent control module includes a neural network structure that learns a large amount of input-output data to establish a mapping relationship between input parameters and control outputs. The neural network adjusts the connection weights between neurons according to a given training algorithm, so that for a given input, the output can be as close to the expected target output as possible.

[0088] Specifically, the solar water heater uses a water circulation system, and the intelligent control module can also be connected to the user's mobile device. The user can view the operating status of the solar water heater system in real time through the mobile device, including water temperature, water level, and circulation pump operating status information, and can remotely control the intelligent control module to operate the system.

[0089] It is understandable that users do not need to be near the solar water heater equipment. Whether in other rooms at home, in the office or out, they can view the various operating status information of the solar water heater system in real time through their mobile devices, including water temperature, water level and circulating pump operating status. This allows users to know the preparation of hot water supply in a timely manner, check whether the water temperature is suitable before taking a bath, or know whether the water heater at home is operating normally and whether the water level is sufficient when going out, which greatly improves the convenience of use and the control of equipment status.

[0090] Specifically, the solar water heater uses a water circulation system, and a pressure sensor is set on the circulation pipe. The intelligent control module monitors the pressure in the pipe in real time and sets a safety range C. When the pressure exceeds the set safety range C, the intelligent control module automatically adjusts the speed of the circulation pump. If the intelligent control module cannot reduce the pressure by adjusting the speed of the circulation pump, the intelligent control module will immediately shut down the circulation water pump and issue an alarm to notify the user to check and repair.

[0091] Figure 2 The flowchart of a water circulation method for a solar water heater according to an embodiment of the present application is schematically shown. Figure 2 As shown, including:

[0092] Specifically, in step 1, the solar collector module works under sunlight, converts solar energy into thermal energy, and heats the water in the solar collector module.

[0093] Specifically, in step 2, the circulating water pump transfers the heated hot water in the heat collection module to the circulating water channel.

[0094] Specifically, in step 3, the intelligent control module monitors various parameters of the flowing water in the circulation pipe in real time through sensors on the circulation pipe.

[0095] Specifically, in step 4, the intelligent control module adjusts the circulating water pump and the regulating valve according to the parameter data of the flowing water.

[0096] Specifically, in step 5, there are several groups of solar collector modules and water storage modules and they are arranged in parallel. Each solar collector or water storage tank works independently and flexibly distributes water flow according to the hot water demand of different areas.

[0097] Specifically, in step 6, the intelligent control module records the time, and when the set cleaning interval is reached, the water tank cleaning operation is performed.

[0098] Specifically, in step 7, the user connects to the intelligent control module through a mobile device to view the operating status of the solar water heater system in real time, including information on water temperature, water level, and operating status of the circulation pump.

[0099] It is understandable that the beneficial effects of the water circulation method of the solar water heater are the same as above and will not be repeated here.

[0100] It should be noted that:

[0101] In the description provided herein, a large number of specific details are described. However, it is understood that the embodiments of the present application can be practiced without these specific details. In some instances, well-known structures and technologies are not shown in detail so as not to obscure the understanding of this description.

[0102] Similarly, it should be understood that in order to streamline the present application and aid in understanding one or more of the various inventive aspects, in the above description of the exemplary embodiments of the present application, the various features of the present application are sometimes grouped together into a single embodiment, figure, or description thereof. However, the disclosed system should not be interpreted as reflecting the following schematic diagram: the claimed application requires more features than those explicitly recited in each claim.

[0103] Rather, as the following claims reflect, inventive aspects lie in less than all features of a single foregoing disclosed embodiment.The claims following the Detailed Description are thus hereby expressly incorporated into this Detailed Description, with each claim standing on its own as a separate embodiment of this application.

[0104] Furthermore, those skilled in the art will appreciate that although some embodiments described herein include certain features included in other embodiments but not other features, the combination of features from different embodiments is meant to be within the scope of the present application and to form different embodiments.

[0105] For example, in the following claims, any of the claimed embodiments can be used in any combination.

[0106] The above is only a preferred specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A water circulation system for a solar water heater, characterized in that: include: Heat collection module, water storage module, water circulation module and intelligent control module; The heat collection module is used to convert solar energy into thermal energy; The water storage module is used to store and keep hot water warm; The water circulation module comprises a circulating water pump and a circulating pipe, wherein the circulating water pump is used to transport cold water to the heat collection module and to make hot water flow in the circulating pipe overcoming the circulation resistance, and the circulating pipe is used to maintain water circulation; The intelligent control module is used to monitor the water temperature and flow rate of hot water in the circulation pipeline, and the intelligent control system can automatically adjust the operating state of the circulation pump; The intelligent control module monitors the temperature through the temperature sensor on the circulation pipe and sets a temperature threshold X. The intelligent control module compares the monitored water temperature of the hot water in the circulation pipe and the water temperature in the water storage tank with the set temperature threshold X, and the temperature of the circulation pipe is set to L; If the circulation pipe temperature L < threshold value X, start the circulation pump; If the circulation pipe temperature L ≥ threshold value X, the circulation pump will not be started; During the operation of the circulating water pump, the intelligent control module monitors the flow rate through the flow sensor on the circulating pipe, sets the flow rate threshold range Z, and compares the monitored flow rate in the circulating pipe with the set flow rate threshold range Z, and sets the circulating pipe flow rate to K; If the circulating pipe flow K is less than the set flow threshold range Z, the intelligent control module first determines whether there is a problem with the circulating water pump itself. If there is a problem with the circulating water pump, a fault alarm is issued; if there is no problem with the circulating water pump, the intelligent control module increases the speed of the circulating water pump; If the circulation pipeline flow K> the set flow threshold range Z, the intelligent control system will reduce the speed of the circulation pump.

2. The water circulation system for solar water heater according to claim 1, characterized in that: The intelligent control module can collect and monitor the temperature data and solar radiation intensity of the heat collection module through the light sensor, and calculate the heat collection efficiency of the heat collection module according to the temperature data. The calculation formula of the heat collection efficiency is: Where η is the collector efficiency; Q u It is the useful heat absorbed by the collector; G t is the total solar radiation intensity; A is the daylighting area of ​​the collector; The intelligent control module can automatically adjust the angle and direction of the heat collection module according to the heat collection efficiency of the heat collection module.

3. The water circulation system for solar water heater according to claim 1, characterized in that: The water storage module includes a water replenishment unit. The intelligent control module monitors the water level in the water storage module in real time through a water level sensor and sets a water level lower limit value N. If the water level drops to the set lower limit value N, the intelligent control module controls the water replenishment unit to replenish the water storage module. The water level upper limit value M is set. If the water level drops to the set upper limit value M, the water replenishment unit stops replenishing water.

4. The water circulation system for solar water heater according to claim 1, characterized in that: The water storage module also includes a cleaning unit, and a cleaning interval time h is set. When the cleaning interval time h is reached, the intelligent control module cuts off the connection between the circulation pipeline and the storage module, discharges the hot water in the storage module, and starts the cleaning unit. After the cleaning is completed, the controller opens the drain port to discharge the sewage, and then rinses multiple times until the water quality meets the requirements, and finally restores the normal working state of the water storage module.

5. The water circulation system for solar water heater according to claim 1, characterized in that: The heat collecting modules and water storage modules include several groups and are arranged in parallel. Each heat collecting module and each water storage tank works independently, and the water flow is flexibly distributed according to the hot water demand of different areas.

6. The water circulation system for solar water heater according to claim 1, characterized in that: The circulation pipeline includes regulating valves, which are distributed at pipeline nodes and branch pipelines of the circulation pipeline. The intelligent control module accurately controls the regulating valves to adjust the size and speed of the water flow according to actual needs.

7. The water circulation system for solar water heater according to claim 1, characterized in that: The intelligent control module includes a neural network structure that establishes a mapping relationship between input parameters and control outputs by learning a large number of input-output data pairs. The neural network adjusts the connection weights between neurons according to a given training algorithm so that for a given input, the output can be as close to the expected target output as possible.

8. The water circulation system for solar water heater according to claim 1, characterized in that: The intelligent control module can also be connected to the user's mobile device, so that the user can view the operating status of the solar water heater system in real time through the mobile device, including information on water temperature, water level, and circulating pump operating status, and can remotely control the intelligent control module to operate the system.

9. The water circulation system for solar water heater according to claim 1, characterized in that: A pressure sensor is arranged on the circulation pipeline, and the intelligent control module monitors the pressure in the pipeline in real time and sets a safety range C. When the pressure exceeds the set safety range C, the intelligent control module automatically adjusts the speed of the circulation pump. If the intelligent control module fails to reduce the pressure by adjusting the speed of the circulation pump, the intelligent control module will immediately shut down the circulation water pump and issue an alarm to notify the user to conduct inspection and maintenance.

10. A water circulation method for a solar water heater, characterized in that: The following steps are involved: S100: The heat collection module works under sunlight, converting solar energy into thermal energy to heat the water in the heat collection module; S200; the circulating water pump transfers the heated hot water in the heat collection module to the circulating water channel; S300: The intelligent control module monitors various parameters of the flowing water in the circulation pipe in real time through sensors on the circulation pipe; S400: the intelligent control module adjusts the circulating water pump and the regulating valve according to the parameter data of the flowing water; S500: There are several groups of heat collector modules and water storage modules and they are arranged in parallel. Each collector or water storage tank works independently and the water flow is flexibly distributed according to the hot water demand in different areas. S600: The intelligent control module records the time, and when the set cleaning interval is reached, the water tank cleaning operation is performed; S700: Users connect to the intelligent control module through mobile devices to view the operating status of the solar water heater system in real time, including information on water temperature, water level, and circulating pump operating status.

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