A balcony wall-mounted solar water heater heat control method, system and device

Abstract

The present application relates to the technical field of heat control based on medium flow dynamic adjustment, in particular to a balcony wall-mounted solar water heater heat control method, system and device, and a balcony wall-mounted solar water heater heat control device, which comprises a collector, a water tank, a medium pipeline, an electric regulating valve, an electromagnetic valve, a first temperature sensor, a second temperature sensor, a third temperature sensor, a controller and a water pipeline, and is internally provided with a balcony wall-mounted solar water heater heat control system, which executes a balcony wall-mounted solar water heater heat control method. Through the electric regulating valve added to the medium pipeline, the water tank temperature is adjusted in combination with dynamic temperature difference and variable parameters, so that accurate temperature control can be realized, the service life of the water heater is prolonged, energy saving and environmental protection are achieved, and the cost is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of heat control based on dynamic adjustment of medium flow, in particular to a balcony wall-mounted solar water heater heat control method, system and device. BACKGROUND

[0002] The balcony wall-mounted solar water heater has become the main application form of city residential hot water supply due to its flexible installation and adaptation to high-rise buildings. Most of the balcony wall-mounted solar water heaters adopt a closed circulation system. After being irradiated by sunlight, the solar collector transmits heat to the circulating medium. After the medium is heated, it flows into the indoor water tank to heat the water in the water tank by means of thermosyphon. After the medium is cooled by the water in the water tank, it returns to the collector by gravity to complete the circulation. However, the current solar heating process lacks effective control, and the water temperature is extremely high in summer with strong sunlight. For example, in the case of high temperature and strong sunlight and long-term non-use of users, the water tank temperature can exceed 100℃, causing the "boiling" phenomenon, which causes the water tank and pipeline pressure to increase dramatically, causing "pipe explosion" accidents. High water temperature is also prone to cause user scalding, and PPR hot water pipes can only withstand 70℃ for a long time. High temperature can accelerate the creep of the water pipe, causing water leakage and shortening the service life of the pipeline.

[0003] However, the existing solar water heater overheating solutions have many drawbacks. For example, the common hot water tank electromagnetic valve drainage cooling method only temporarily cools down when the temperature is extremely high, and cannot stably control the water temperature within the appropriate range (according to the "Building Water Supply and Drainage Design Standard" GB50015-2019, the water heating equipment outlet temperature should not exceed 70℃), which also causes water resource waste, large water temperature fluctuations, and high-temperature drainage causing secondary disasters. The solar collector sunshade facility method has problems such as untimely shading and complicated operation. Automatic control faces the problems of complex structure, high failure rate, response lag, and safety hazards caused by aging and falling of the sunshade curtain, and is less used in practice.

[0004] Therefore, the present application proposes a balcony wall-mounted solar water heater heat control method, system and device to solve the above problems. SUMMARY

[0005] The present application is developed to solve the problems of the prior art. A balcony wall-mounted solar water heater heat control method, system and device are developed. The present application adjusts the temperature of the water tank by adding an electric regulating valve to the medium pipeline, combining dynamic temperature difference and control parameter adjustment, which can realize precise temperature control, prolong the service life of the water heater, save energy and protect the environment, and reduce costs.

[0006] The technical scheme for solving the technical problems of the present application is a balcony wall-mounted solar water heater heat control method applied to a balcony wall-mounted solar water heater heat control device, which comprises a collector, a water tank, a medium pipeline, an electric regulating valve, a solenoid valve, a first temperature sensor, a second temperature sensor, a third temperature sensor, a controller and a water pipeline, and is characterized by the following steps:

[0007] S1, the balcony wall-mounted solar water heater heat control device starts to run, and the temperatures of the first temperature sensor, the second temperature sensor and the third temperature sensor are read respectively 、 and ;

[0008] S2, the size between the temperature of the second temperature sensor and the set temperature threshold value is judged .

[0009] If , the opening of the electric regulating valve is set to 100%, and the temperature of the second temperature sensor is read again to judge the size between the temperature and the temperature threshold value until , and then stop; If , the next step is performed;

[0010] S3, the size between the temperature of the second temperature sensor and the set temperature threshold value is judged .

[0011] If , the electric regulating valve is closed;

[0012] If , the next step is performed;

[0013] If , the next step is performed;

[0014] S4, the dynamic temperature difference , and between the temperatures of the first temperature sensor, the second temperature sensor and the third temperature sensor is calculated, and the temperature rising rate of the second temperature sensor is calculated, and the size between the temperature rising rate of the second temperature sensor and the set temperature rising rate threshold value is judged . If , the control parameter is adjusted, and then the next step is performed;

[0015] If , the next step is performed;

[0016] ​​​​If yes, then the fixed control parameter is adopted, and the next step is performed.

[0017] S5, the control amount is calculated according to the control parameter determined in step S4, and the control amount is converted into a current signal, and then the opening degree of the electric regulating valve is adjusted, and then the temperature of the second temperature sensor is read again , and the size between the temperature and the set temperature threshold value is judged.

[0018] If , go to step S2.

[0019] If , open the electromagnetic valve, and then perform the next step.

[0020] S6, the temperature of the second temperature sensor is read again , the size between the temperature and the set temperature threshold value is judged.

[0021] If , continue to open the electromagnetic valve until stop.

[0022] If , close the electromagnetic valve, and then perform the next step.

[0023] S7, the temperature of the second temperature sensor is read again , the size between the temperature and the set temperature threshold value is judged.

[0024] If , go to step S4.

[0025] If , the balcony wall-mounted solar water heater heat control device ends running.

[0026] Step S2 is as follows:

[0027] The first temperature sensor collects the collector outlet temperature, the second temperature sensor collects the water tank middle temperature, and the third temperature sensor collects the water tank outlet temperature. The sampling frequency of the three temperature sensors is 1Hz.

[0028] Step S4 is as follows:

[0029] (1) Calculate the dynamic temperature difference and temperature rise rate:

[0030] According to the temperature , and , the dynamic temperature difference , the calculation formula is as follows:

[0031] ;

[0032] The temperature rise rate of the second temperature sensor is calculated in units of 60s, and the calculation formula is as follows:

[0033] ,

[0034] Wherein, represents the temperature of the second temperature sensor at time t, represents the temperature of the second temperature sensor at time t;

[0035] (2) Control parameters:

[0036] The control parameters include proportional coefficient and integral coefficient;

[0037] If , the fixed control parameters are adopted, and the fixed control parameters include proportional coefficient and integral coefficient ;

[0038] If , the control parameters are adjusted, and the adjusted control parameters include proportional coefficient and integral coefficient , and the calculation formula of adjusting the control parameters is as follows:

[0039] ,

[0040] ,

[0041] Wherein, represents the adjusted proportional coefficient, represents the adjusted integral coefficient, represents the attenuation factor at time t.

[0042] Step S5 is specifically as follows:

[0043] According to the dynamic temperature difference and the control parameters, the control amount C is calculated, and the control parameters are fixed control parameters , or adjusted control parameters , if is not satisfied, the control amount calculation formula is as follows:

[0044] ,

[0045] If​​​ The control amount is calculated according to the following formula:

[0046] ;

[0047] Then, the control amount is converted into a 4-20mA current signal The calculation formula is as follows:

[0048] ,

[0049] Wherein, , respectively represent the preset maximum and minimum values of the control amount;

[0050] The current signal is then used to adjust the opening of the electric regulating valve The calculation formula is as follows:

[0051] .

[0052] The application also provides a balcony wall-mounted solar water heater heat control system, which executes a balcony wall-mounted solar water heater heat control method, comprising the following modules:

[0053] Temperature data acquisition module: acquiring the temperature of the first temperature sensor, the second temperature sensor and the third temperature sensor;

[0054] Water tank heating module: setting a temperature threshold Comparing the temperature data collected by the temperature data acquisition module with the temperature threshold to determine whether the electric regulating valve needs to be opened to heat the water tank;

[0055] Temperature adjustment module: setting a temperature threshold Comparing the temperature data collected by the temperature data acquisition module with the temperature threshold to determine whether the electric regulating valve needs to be closed;

[0056] Control parameter adjustment module: according to the temperature of the second temperature sensor adjusted by the temperature adjustment module, the temperature of the second temperature sensor and the third temperature sensor, calculating the dynamic temperature difference and the temperature rise rate of the second temperature sensor, and according to the set temperature rise rate threshold Determining whether the control parameter needs to be adjusted;

[0057] Electric regulating valve adjustment module: comparing the temperature of the second temperature sensor adjusted by the control parameter adjustment module with the temperature threshold To determine whether the electromagnetic valve needs to be opened;

[0058] Pressure relief protection module: when it is determined by the electric regulating valve adjustment module that the electromagnetic valve needs to be opened, the electromagnetic valve is opened to release water and reduce temperature;

[0059] Restarting the heating module after depressurization: The temperature of the second temperature sensor used to cool down the drained water is compared with the temperature threshold. Compare the results to determine whether it is necessary to continue opening the solenoid valve to drain water and reduce pressure.

[0060] The present invention also provides a heat control device for a balcony wall-mounted solar water heater, which is controlled by a heat control system for a balcony wall-mounted solar water heater and executes a heat control method for a balcony wall-mounted solar water heater, including a collector, a water tank, a medium pipeline, an electric regulating valve, a solenoid valve, a first temperature sensor, a second temperature sensor, a third temperature sensor, a controller, and a water pipeline.

[0061] The solar collector is installed on the lower part of the exterior wall of the balcony, and the water tank is installed on the upper part of the interior wall of the balcony. The water tank is equipped with a second temperature sensor, a controller, and water pipes. The water pipes include a water pipe for water to flow out of the water tank and a water pipe for water to flow into the water tank. A third temperature sensor and a solenoid valve are installed on the water pipe for water to flow out of the water tank. The solar collector and the water tank are connected by a medium pipe. An electric regulating valve is installed on the medium pipe for the medium flowing from the water tank to the solar collector, and a first temperature sensor is installed on the medium pipe for the medium flowing from the solar collector to the water tank.

[0062] The effects described in the invention are merely those of the embodiments, and not all the effects of the invention. The above technical solutions have the following advantages or beneficial effects:

[0063] This invention achieves precise heat control of balcony wall-mounted solar water heaters by installing an electric regulating valve in the medium circulation pipeline between the collector and the water tank, combined with multi-node temperature feedback and adaptive PID control algorithms. It integrates multi-sensor data, dynamic parameter adjustment algorithms, and a tiered safety protection mechanism. This prevents overheating caused by uncontrollable heating, which could reduce equipment and pipe lifespan, cause scalding, and endanger personnel safety. The invention offers advantages such as precise temperature control, safety, extended lifespan, energy saving, environmental friendliness, and low cost, enabling efficient, safe, and stable operation of balcony wall-mounted solar water heaters. Attached Figure Description

[0064] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0065] Figure 1 This is a flowchart illustrating the method of the present invention.

[0066] Figure 2 This is a schematic diagram of the structure of the device of the present invention;

[0067] AppendixFigure 2 Marker explanation:

[0068] 1. Solar collector; 2. Water tank; 3. Medium pipeline; 4. Electric regulating valve; 5. Solenoid valve; 6. First temperature sensor; 7. Second temperature sensor; 8. Third temperature sensor; 9. Controller; 10. Water pipeline. Detailed Implementation

[0069] To clearly illustrate the technical features of this solution, the invention will be described in detail below through specific embodiments and in conjunction with the accompanying drawings. The following disclosure provides many different embodiments or examples for implementing different structures of the invention. To simplify the disclosure of the invention, the components and arrangements of specific examples are described below.

[0070] Example 1

[0071] A residential project used a balcony-mounted solar energy system. Before residents moved in in July 2024, the system was not filled with circulating media. On June 25, 2024, residents began filling the system, and the heating function was activated, but residents did not move in immediately. On July 1, 2024, residents officially moved in and found that the solar water tank temperature had reached 95℃. When the hot water tap was turned on, a large amount of hot water containing steam was released, making it unusable due to the excessive temperature. This process lasted for about one hour. A week after moving in, a leak was discovered in the hot water pipes laid under the floor slab, necessitating the excavation of the floor for repairs.

[0072] To prevent the above situation from recurring, the user modified the hot water system by using a balcony wall-mounted solar water heater heat control device from this invention, installing a balcony wall-mounted solar water heater heat control system, and implementing a balcony wall-mounted solar water heater heat control function. By adding an electric regulating valve to the medium pipeline, the water temperature in the hot water tank was controlled below 70°C, and the overheating situation no longer occurred.

[0073] like Figure 1 As shown, a heat control method for a balcony wall-mounted solar water heater is applied to a heat control device for a balcony wall-mounted solar water heater. The heat control device includes a collector, a water tank, a medium pipeline, an electric regulating valve, a solenoid valve, a first temperature sensor, a second temperature sensor, a third temperature sensor, a controller, and water pipelines. The method is characterized by performing the following steps:

[0074] S1. The heat control device of the balcony wall-mounted solar water heater starts operating, reading the temperatures from the first, second, and third temperature sensors respectively. , and ;

[0075] S2. Determine the temperature of the second temperature sensor. With the set temperature threshold The size between ;

[0076] like Then, set the opening of the electric regulating valve to 100% and read the temperature from the second temperature sensor. Then, it is judged again against the temperature threshold. The size between, until Stop at this time;

[0077] like If so, proceed to the next step;

[0078] S3. Determine the temperature of the second temperature sensor. With the set temperature threshold The size between ;

[0079] like Then the electric regulating valve will be closed;

[0080] like If so, proceed to the next step;

[0081] S4. Based on the temperatures from the first temperature sensor, the second temperature sensor, and the third temperature sensor... , and Calculate dynamic temperature difference The rate of temperature rise of the second temperature sensor Determine the rate of temperature rise of the second temperature sensor. With the set temperature rise rate threshold The size between ;

[0082] like If so, adjust the control parameters and then proceed to the next step;

[0083] like If so, then use fixed control parameters and proceed to the next step;

[0084] S5. Calculate the control quantity based on the control parameters determined in step S4, convert the control quantity into a current signal, and then adjust the opening of the electric regulating valve. Then, read the temperature from the second temperature sensor again. and determine the temperature With the set temperature threshold The size between ;

[0085] like Then proceed to step S2;

[0086] like If so, the solenoid valve will be activated, and then proceed to the next step;

[0087] S6. Read the temperature from the second temperature sensor again. Determine the temperature With the set temperature threshold The size between ;

[0088] like Then continue to open the solenoid valve until... Stop at this time;

[0089] like If so, close the solenoid valve and proceed to the next step;

[0090] S7. Read the temperature from the second temperature sensor again. Determine the temperature With the set temperature threshold The size between ;

[0091] like Then proceed to step S4;

[0092] like Then the heat control device of the balcony wall-mounted solar water heater will stop operating.

[0093] Step S2 is as follows:

[0094] The first temperature sensor collects the outlet temperature of the solar collector, the second temperature sensor collects the temperature in the middle of the water tank, and the third temperature sensor collects the outlet temperature of the water tank. The sampling frequency of all three temperature sensors is 1Hz.

[0095] Step S4 is as follows:

[0096] (1) Calculate the dynamic temperature difference and the rate of temperature rise:

[0097] According to temperature , and Calculate dynamic temperature difference The calculation formula is as follows:

[0098] ;

[0099] According to different scenarios Develop corresponding control strategies, as shown in Table 1.

[0100] Table 1. Different Scenarios The corresponding control response of the feature

[0101]

[0102] The temperature rise rate of the second temperature sensor is calculated in 60-second increments using the following formula:

[0103] ,

[0104] in, express The temperature of the second temperature sensor at any given time. express The temperature of the second temperature sensor at any given time;

[0105] (2) Control parameters:

[0106] Control parameters include proportional coefficient and integral coefficient;

[0107] like In this case, fixed control parameters are used, including the proportional coefficient. and integral coefficient ;

[0108] like If so, adjust the control parameters, including the proportional coefficient. and integral coefficient The formula for calculating the control parameters is as follows:

[0109] ,

[0110] ,

[0111] in, This represents the adjusted proportional coefficient. This represents the adjusted integral coefficient. express The decay factor at time.

[0112] Step S5 is as follows:

[0113] Based on dynamic temperature difference The control quantity C is calculated based on the control parameters, where the control parameters are fixed. , Or the adjusted control parameters If not satisfied The formula for calculating the control quantity is as follows:

[0114] ,

[0115] If satisfied The formula for calculating the control quantity is as follows:

[0116] ;

[0117] Then, the control signal is converted into a 4~20mA current signal. The calculation formula is as follows:

[0118] ,

[0119] in, , These represent the preset maximum and minimum values ​​of the control quantity, which can be determined during the debugging process;

[0120] The current signal is then used to adjust the opening of the electric regulating valve. The calculation formula is as follows:

[0121] .

[0122] A heat control method for a balcony wall-mounted solar water heater follows the principle of graded safety protection control, as shown in Table 2.

[0123] Table 2. Principles of Graded Safety Protection and Control

[0124]

[0125] Example 2

[0126] A heat control system for a balcony wall-mounted solar water heater, implementing a heat control method for a balcony wall-mounted solar water heater, includes the following modules:

[0127] Temperature data acquisition module: acquires the temperatures from the first temperature sensor, the second temperature sensor, and the third temperature sensor;

[0128] Water tank heating module: Set temperature threshold The temperature data collected by the temperature data acquisition module is compared with the temperature threshold to determine whether the electric regulating valve needs to be turned on to heat the water tank.

[0129] Temperature control module: Set temperature threshold The temperature data collected by the temperature data acquisition module is compared with the temperature threshold to determine whether the electric regulating valve needs to be closed.

[0130] Control parameter adjustment module: Based on the temperature of the second temperature sensor after adjustment by the temperature regulation module, and the temperatures of the second and third temperature sensors, calculates the dynamic temperature difference and the temperature rise rate of the second temperature sensor, and applies the set temperature rise rate threshold. Determine whether the control parameters need to be adjusted;

[0131] Electric regulating valve adjustment module: Compare the temperature of the second temperature sensor after adjustment by the control parameter adjustment module with the temperature threshold. The size between these parameters determines whether the solenoid valve needs to be opened.

[0132] Pressure relief protection module: When the electric regulating valve regulating module determines that the solenoid valve needs to be opened, the solenoid valve is opened to release water and cool down.

[0133] Restarting the heating module after depressurization: The temperature of the second temperature sensor used to cool down the drained water is compared with the temperature threshold. Compare the results to determine whether it is necessary to continue opening the solenoid valve to drain water and reduce pressure.

[0134] Example 3

[0135] like Figure 2 As shown, a heat control device for a balcony wall-mounted solar water heater is controlled by a heat control system for a balcony wall-mounted solar water heater and executes a heat control method for a balcony wall-mounted solar water heater. It includes a collector, a water tank, a medium pipeline, an electric regulating valve, a solenoid valve, a first temperature sensor, a second temperature sensor, a third temperature sensor, a controller, and a water pipeline.

[0136] The solar collector is installed on the lower part of the exterior wall of the balcony, and the water tank is installed on the upper part of the interior wall of the balcony. The water tank is equipped with a second temperature sensor, a controller, and water pipes. The water pipes include a water pipe for water to flow out of the water tank and a water pipe for water to flow into the water tank. A third temperature sensor and a solenoid valve are installed on the water pipe for water to flow out of the water tank. The solar collector and the water tank are connected by a medium pipe. An electric regulating valve is installed on the medium pipe for the medium flowing from the water tank to the solar collector, and a first temperature sensor is installed on the medium pipe for the medium flowing from the solar collector to the water tank.

[0137] Among them, an electric regulating valve is added. An electric regulating valve with a linear relationship between opening degree and driving current is installed on the medium transmission pipeline between the solar water heater collector and the water tank. This can ensure smooth and precise regulation and provide a hardware foundation for achieving precise medium flow control.

[0138] Three temperature sensors are installed to monitor the collector outlet temperature. Temperature in the middle of the water tank Water tank outlet temperature , Used to sense solar irradiance intensity in real time and reflect the rate of heat input; Used to characterize the current heat storage; Used to reflect actual water demand and the rate of heat consumption, when Time indicates continuous heat input, when This indicates insufficient heat consumption on the user's end, and the risk of overheating should be noted.

[0139] The heat control device for balcony wall-mounted solar water heaters uses an integrated embedded controller (example model STM32F407) with multi-channel synchronous acquisition of multi-node temperature signals and a floating-point arithmetic unit to meet the system's requirements for rapid acquisition and complex calculation of multi-temperature data, and to provide hardware support for the operation of intelligent temperature control algorithms.

[0140] Although the specific embodiments of the invention have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the invention. Based on the technical solutions of the invention, various modifications or variations that can be made by those skilled in the art without creative effort are still within the scope of protection of the invention.

Claims

1. A method for controlling the heat of a balcony wall-mounted solar water heater, used in a balcony wall-mounted solar water heater heat control device, the balcony wall-mounted solar water heater heat control device including a collector, a water tank, a medium pipeline, an electric regulating valve, a solenoid valve, a first temperature sensor, a second temperature sensor, a third temperature sensor, a controller, and water pipelines, the collector being installed on the lower part of the outdoor wall of the balcony, the water tank being installed on the upper part of the indoor wall of the balcony, the water tank being equipped with a second temperature sensor, a controller, and water pipelines, the water pipelines including a water pipeline for water flowing out of the water tank and a water pipeline for water flowing into the water tank, the water pipeline for water flowing out of the water tank being equipped with a third temperature sensor and a solenoid valve, the collector and the water tank being connected through a medium pipeline, the medium pipeline for medium flowing from the water tank to the collector being equipped with an electric regulating valve, the medium pipeline for medium flowing from the collector to the water tank being equipped with a first temperature sensor, characterized in that, executing The following steps: S1. The heat control device of the balcony wall-mounted solar water heater starts operating, reading the temperatures from the first, second, and third temperature sensors respectively. , and ; S2. Determine the temperature of the second temperature sensor. With the set temperature threshold The size between; like Then, set the opening of the electric regulating valve to 100% and read the temperature from the second temperature sensor. Then, it is judged again against the temperature threshold. The size between, until Stop at this time; like If so, proceed to the next step; S3. Determine the temperature of the second temperature sensor. With the set temperature threshold The size between; like Then the electric regulating valve will be closed; like If so, proceed to the next step; S4. Based on the temperatures from the first temperature sensor, the second temperature sensor, and the third temperature sensor... , and Calculate dynamic temperature difference The rate of temperature rise of the second temperature sensor Determine the rate of temperature rise of the second temperature sensor. With the set temperature rise rate threshold The size between; like If so, adjust the control parameters and then proceed to the next step; like If so, then use fixed control parameters and proceed to the next step; Step S4 is as follows: (1) Calculate the dynamic temperature difference and the rate of temperature rise: According to temperature , and Calculate dynamic temperature difference The calculation formula is as follows: ； The temperature rise rate of the second temperature sensor is calculated in 60-second increments using the following formula: ， in, express The temperature of the second temperature sensor at any given time. express The temperature of the second temperature sensor at any given time; (2) Control parameters: Control parameters include proportional coefficient and integral coefficient; like In this case, fixed control parameters are used, including the proportional coefficient. and integral coefficient ; like If so, adjust the control parameters, including the proportional coefficient. and integral coefficient The formula for calculating the control parameters is as follows: ， ， in, This represents the adjusted proportional coefficient. This represents the adjusted integral coefficient. express The decay factor at time; S5. Calculate the control quantity based on the control parameters determined in step S4, convert the control quantity into a current signal, and then adjust the opening of the electric regulating valve. Then, read the temperature from the second temperature sensor again. and determine the temperature With the set temperature threshold The size between; like Then proceed to step S2; like If so, the solenoid valve will be activated, and then proceed to the next step; S6. Read the temperature from the second temperature sensor again. Determine the temperature With the set temperature threshold The size between; like Then continue to open the solenoid valve until... Stop at this time; like If so, close the solenoid valve and proceed to the next step; S7. Read the temperature from the second temperature sensor again. Determine the temperature With the set temperature threshold The size between; like Then proceed to step S4; like Then the heat control device of the balcony wall-mounted solar water heater will stop operating.

2. The heat control method for a balcony wall-mounted solar water heater according to claim 1, characterized in that, Step S2 is as follows: The first temperature sensor collects the outlet temperature of the solar collector, the second temperature sensor collects the temperature in the middle of the water tank, and the third temperature sensor collects the outlet temperature of the water tank. The sampling frequency of all three temperature sensors is 1Hz.

3. The heat control method for a balcony wall-mounted solar water heater according to claim 2, characterized in that, Step S5 is as follows: Based on dynamic temperature difference The control quantity C is calculated based on the control parameters, where the control parameters are fixed. , Or the adjusted control parameters If not satisfied The formula for calculating the control quantity is as follows: ， If satisfied The formula for calculating the control quantity is as follows: ； Then, the control signal is converted into a 4~20mA current signal. The calculation formula is as follows: , in, , These represent the preset maximum and minimum control values, respectively. The current signal is then used to adjust the opening of the electric regulating valve. The calculation formula is as follows: 。 4. A heat control device for a balcony wall-mounted solar water heater, characterized in that, The heat control method for a balcony wall-mounted solar water heater as described in claim 1 is implemented.

5. A heat control system for a balcony wall-mounted solar water heater, implementing the heat control method for a balcony wall-mounted solar water heater as described in any one of claims 1-3, characterized in that, Includes the following modules: Temperature data acquisition module: acquires the temperatures from the first temperature sensor, the second temperature sensor, and the third temperature sensor; Water tank heating module: Set temperature threshold The temperature data collected by the temperature data acquisition module is compared with the temperature threshold to determine whether the electric regulating valve needs to be turned on to heat the water tank. Temperature control module: Set temperature threshold The temperature data collected by the temperature data acquisition module is compared with the temperature threshold to determine whether the electric regulating valve needs to be closed. Control parameter adjustment module: Based on the temperature of the second temperature sensor after adjustment by the temperature regulation module, and the temperatures of the second and third temperature sensors, calculates the dynamic temperature difference and the temperature rise rate of the second temperature sensor, and applies the set temperature rise rate threshold. Determine whether the control parameters need to be adjusted; Electric regulating valve adjustment module: Compare the temperature of the second temperature sensor after adjustment by the control parameter adjustment module with the temperature threshold. The size between these parameters determines whether the solenoid valve needs to be opened. Pressure relief protection module: When the electric regulating valve regulating module determines that the solenoid valve needs to be opened, the solenoid valve is opened to release water and cool down. Restarting the heating module after depressurization: The temperature of the second temperature sensor used to cool down the drained water is compared with the temperature threshold. Compare the results to determine whether it is necessary to continue opening the solenoid valve to drain water and reduce pressure.

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