Intelligent antifreeze control method and control system for solar heating control module

Abstract

The present invention relates to the technical field of solar heating control modules, and discloses an intelligent antifreeze control method and control system for a solar heating control module. The control method, for drainage control, sets a heating threshold and a first water level threshold, and compares the heating temperature with the heating threshold. If the heating temperature is lower than the heating threshold, a water level comparison is performed. If the water level is lower than the first water level threshold, the water in the junction box and the vacuum tube is discharged. For water supply control, a temperature difference threshold between the heating temperature and the heating temperature is set, and the actual temperature difference between the two is compared with the temperature difference threshold. If the actual temperature difference is greater than the temperature difference threshold, water supply is performed. The control system is constructed based on the control method. The present invention not only prevents the vacuum tube from bursting in a severe cold environment, but also enables it to always meet the user's water needs.

Description

Technical Field

[0001] The present invention relates to the technical field of solar heating control modules, and in particular to an intelligent antifreeze control method and control system for a solar heating control module. Background Art

[0002] The solar heating control module is the heating element of a solar water heater, converting solar energy into heat to meet the demand for hot water or heating. Compared to instantaneous water heaters and storage water heaters that rely on electricity, or other heating equipment powered by natural gas, coal, or other mineral energy sources, the solar heating control module offers the advantages of being cleaner, more environmentally friendly, and safer to use.

[0003] The vacuum tube solar heating control module is the most widely used solar heating control module, currently accounting for 95% of the market share. Its heat collection system primarily consists of vacuum tubes and a heat collection tank. Based on the principle that hot water rises and cold water sinks, when the water in the vacuum tubes is heated by solar heat radiation, it circulates with the cold water in the heat collection tank due to the temperature difference, continuously heating the water in the heat collection tank. The hot water in the heat collection tank is then stored in a corresponding water storage tank to meet user needs.

[0004] However, in severe winters, especially in northern China, where ambient temperatures often drop to -20°C or even -40°C, water in the solar heating control module can freeze due to its thermal contraction and expansion, often damaging the water heater and causing the vacuum tube to rupture. Furthermore, at night or on cloudy days when there is no solar energy, the hot water in the collector tank can be lost through heat exchange, resulting in heat waste and hindering people's ability to use it. Summary of the Invention

[0005] The purpose of the present invention is to provide an intelligent antifreeze control method for a solar heating control module, which can automatically drain and fill the water heater collection group according to temperature monitoring to solve the technical problems of water heater damage and heat loss at low temperatures.

[0006] The present invention also provides an intelligent antifreeze control system for a solar heating control module. The control system is constructed based on the control method, thereby effectively realizing the self-circulation, automatic emptying and water filling of the water heater.

[0007] To achieve the above objectives, the present invention proposes the following technical solutions:

[0008] An intelligent antifreeze control method for a solar heating control module, comprising:

[0009] Power on the solar heating control module;

[0010] Set a temperature threshold and a first water level threshold. The temperature threshold is the minimum threshold of the heating temperature, and the heating temperature is defined as the temperature of the vacuum tube; the first water level threshold is the lowest water level of the header;

[0011] The MCU processing module collects the actual heating temperature and compares it with the temperature threshold. If it is not less than the temperature threshold, the MCU processing module keeps the solar heating control module in the current operating state.

[0012] If the actual heating temperature is lower than the temperature threshold, the MCU processing module collects the actual water level value of the header and compares it with the first water level threshold; if it is equal to the first water level threshold, the MCU processing module keeps the solar heating control module in the current operating state;

[0013] If the actual water level value is not equal to the first water level threshold, the MCU processing module controls the header to drain the water in the header and the vacuum tube into the hot water tank until the actual water level value of the header is equal to the first water level threshold.

[0014] Further, including:

[0015] Set the first time frame;

[0016] If the actual water level value of the header is not equal to the first water level threshold, the actual time value is collected by the MCU processing module; if the time value is within the set first time range, the solar heating control module is kept in the current operating state by the MCU processing module;

[0017] If the time value is not within the set first time range, the MCU processing module controls the header to drain the water in the header and the vacuum tube into the hot water tank until the actual water level value of the header is equal to the first water level threshold.

[0018] Further, including:

[0019] Set a temperature difference threshold and a second water level threshold; the temperature difference threshold is the temperature difference set value between the heating temperature of the vacuum tube and the heating temperature in the hot water tank, and the second water level threshold is the target water level of the header;

[0020] The MCU processing module collects the actual heating temperature and the heating temperature; and compares the actual temperature difference between the two with the temperature difference threshold; if the actual temperature difference is greater than the temperature difference threshold, the MCU processing module keeps the solar heating control module in the current operating state;

[0021] If the actual temperature difference is not greater than the temperature difference threshold, the actual water level value in the header is collected by the MCU processing module. If the actual water level value is not less than the second water level threshold, the solar heating control module is kept in the current operating state by the MCU processing module.

[0022] If the actual water level value is less than the second water level threshold, the header is filled with water through the MCU processing module until the actual water level is equal to the second water level threshold.

[0023] Furthermore, the second water level threshold is the highest water level when the header is full.

[0024] Further, including:

[0025] Set the water supply time threshold;

[0026] When the header is being filled with water, the MCU processing module obtains the actual filling time and compares it with the filling time threshold; if it is greater than the filling time threshold, it is again determined whether the actual heating temperature is less than the heating threshold;

[0027] If the actual heating temperature is lower than the heating threshold, the MCU processing module stops supplying water to the junction box.

[0028] Further, including:

[0029] Set a second time range;

[0030] If the actual water level value of the header is less than the second water level threshold, the actual time value is collected by the MCU processing module; if the time value is not within the set second time range, the solar heating control module is kept in the current operating state by the MCU processing module;

[0031] If the time value is within the set second time range, the header is filled with water through the MCU processing module until the actual water level of the header is equal to the second water level threshold.

[0032] An intelligent antifreeze control system for a solar heating control module includes a vacuum tube, a header, a hot water tank, and an MCU processing module coordinated therewith; the vacuum tube is connected to the header, and the header and the hot water tank are in circular communication via an exhaust pipe and a water supply pipe;

[0033] The vacuum tube is provided with a first temperature sensor, which is connected to the first input terminal of the MCU processing module for collecting the actual heating temperature;

[0034] A second temperature sensor is provided on the header and is connected to the second input terminal of the MCU processing module for collecting the actual header temperature;

[0035] The hot water tank is provided with a third temperature sensor, which is connected to the third input terminal of the MCU processing module for collecting the actual heating temperature;

[0036] The header is also provided with a water level sensor, which is connected to the fourth input terminal of the MCU processing module for collecting the actual water level value;

[0037] The first output end of the MCU processing module is connected to the solenoid valve on the drain pipe, and the second output end is connected to the solenoid valve on the water supply pipe.

[0038] Furthermore, it includes a clock module, which is connected to the fifth input terminal of the MCU processing module and is used for collecting actual time values.

[0039] Furthermore, it includes a heating water tank, which is connected to the hot water tank and is used for indoor heating.

[0040] Beneficial effects:

[0041] As can be seen from the above technical solutions, the technical solution of the present invention provides an intelligent antifreeze control method for a solar heating control module to address frozen pipes in severe cold weather and heat loss in the absence of solar energy. The control method mainly consists of two control processes: drainage and water supply.

[0042] For drainage control, a heating threshold and a first water level threshold are first set to provide reference values for the MCU processing module to analyze the heating temperature and water level. Since the heating temperature corresponds to the vacuum tube temperature and is also the actual ambient temperature, when the ambient temperature is too low, the water inside the vacuum tube is prone to cold expansion, which can cause the tube to burst. Therefore, the MCU processing module compares the heating temperature with the heating threshold. If the heating temperature is less than the heating threshold, it indicates that the vacuum tube is likely to burst. The MCU processing module then compares the water level inside the header with the first water level threshold. Since the first water level threshold represents the lowest water level inside the header, if the actual water level is not equal to the first water level threshold, it indicates that water is stored in the solar collector group. The MCU processing module then drains the water from the header. Since the vacuum tube and header are connected, when the water level inside the header reaches the first water level threshold, both the vacuum tube and the header are empty. This effectively prevents the solar collector group from bursting and being damaged in cold conditions. And since the first triggering quantity of the above drainage process is temperature, the drainage process can also be triggered in low temperature environments at night and on cloudy days when there is no solar energy, so as to store the hot water in the solar collector group and reduce heat loss.

[0043] During the water filling process, since the temperature of the water in the vacuum tube is consistent with that in the hot water tank, a threshold temperature difference between the heating temperature and the supply temperature is set. The MCU processing module then compares the actual temperature difference with the threshold. If the actual temperature difference exceeds the threshold, it indicates that the temperature difference between the water and the vacuum tube is too large. If water from the hot water tank is then added to the vacuum tube, this large temperature difference between the water and the vacuum tube could easily cause the vacuum tube to rupture. Therefore, the MCU processing module controls the solar heating control module to maintain its current operating state until the actual temperature difference is no greater than the threshold, at which point water filling resumes. This prevents vacuum tube rupture while ensuring that the water temperature in the hot water tank meets user water needs.

[0044] From the above analysis, it can be concluded that the control method not only prevents the vacuum tube from bursting in a severe cold environment, but also enables it to always meet the user's water needs through a self-circulation control process of draining water when the ambient temperature is too low and filling water when the temperature meets the working conditions of the vacuum tube.

[0045] The present invention also provides an intelligent antifreeze control system for a solar heating control module. The control system is constructed based on the control method, thereby effectively realizing the self-circulating automatic emptying and water filling of the solar heating control module.

[0046] It should be appreciated that all combinations of the foregoing concepts, as well as additional concepts described in greater detail below, to the extent such concepts are not mutually inconsistent, can be considered to be part of the inventive subject matter of this disclosure.

[0047] The foregoing and other aspects, embodiments, and features of the present invention will be more fully understood from the following description in conjunction with the accompanying drawings. Other additional aspects of the present invention, such as features and / or beneficial effects of the exemplary embodiments, will become apparent from the following description or through practice of specific embodiments according to the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] The accompanying drawings are not intended to be drawn to scale. In the drawings, each identical or nearly identical component shown in various figures may be represented by the same reference numeral. For the sake of clarity, not every component is labeled in every figure. Embodiments of various aspects of the present invention will now be described by way of example and with reference to the accompanying drawings, in which:

[0049] Figure 1 This is a flow chart of the intelligent antifreeze control method for the solar heating control module according to the present invention;

[0050] Figure 2 This is a structural diagram of the intelligent antifreeze control system of the solar heating control module described in the present invention. DETAILED DESCRIPTION

[0051] To further clarify the objectives, technical solutions, and advantages of the embodiments of the present invention, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only a portion of the embodiments of the present invention, not all of them. Based on the described embodiments of the present invention, all other embodiments derived by persons of ordinary skill in the art without requiring creative effort are within the scope of protection of the present invention. Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meanings understood by persons of ordinary skill in the field to which the present invention pertains.

[0052] The words "first", "second" and similar terms used in the patent application specification and claims of the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, unless the context clearly indicates otherwise, the singular forms of "a", "an" or "the" and similar terms do not indicate a quantitative limitation, but rather indicate the presence of at least one. Words such as "include" or "comprise" mean that the elements or objects appearing before "include" or "comprise" include the features, wholes, steps, operations, elements and / or components listed after "include" or "comprise", and do not exclude the existence or addition of one or more other features, wholes, steps, operations, elements, components and / or their collections. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0053] The present invention provides an intelligent antifreeze control method and control system for a solar heating control module. The intelligent antifreeze control method is based on temperature monitoring and includes drainage control and water supply control. In drainage control, the MCU processing module compares the heating temperature with a heating threshold. If the heating temperature is lower than the heating threshold, the water level in the header is further compared with a first water level threshold to determine whether there is water in the header. If the water level is lower than the first water level threshold, the MCU processing module drains the water in the header into the hot water tank. In water supply control, the MCU processing module compares the actual temperature difference between the heating temperature and the heating temperature of the hot water tank with a temperature difference threshold. If the actual temperature difference is greater than the temperature difference threshold, indicating that there is a risk of pipe bursting when water is supplied, the MCU processing module controls the solar heating control module to maintain the current state until the actual temperature difference is no greater than the temperature difference threshold, at which point water is supplied to the header. The control method not only prevents vacuum tubes from bursting in severe cold environments but also consistently meets users' water needs.

[0054] The control system is constructed based on the control method, which effectively realizes the self-circulating automatic emptying and water filling of the solar heating control module.

[0055] The intelligent antifreeze control method of the solar heating control module disclosed in the present invention will be further specifically introduced below in conjunction with the embodiments shown in the accompanying drawings.

[0056] like Figure 1 As shown, the control method mainly includes two processes: drainage and water supply. The specific steps are as follows:

[0057] S102, powering on the solar heating control module;

[0058] In this step, all relevant functional modules of the solar heating control module are powered on to ensure the smooth progress of the control process.

[0059] S104, setting a temperature threshold and a first water level threshold, wherein the temperature threshold is a minimum threshold of the heating temperature, and the heating temperature is defined as the temperature of the vacuum tube; and the first water level threshold is the lowest water level of the header;

[0060] In this step, the heating temperature in actual use is the current ambient temperature. Therefore, setting a temperature threshold provides a reference for subsequent analysis of whether the heating temperature is too high or too low, and confirms whether the vacuum tube is in a temperature environment that may cause the tube to explode. Because the vacuum tube is connected to the first water level threshold, a first water level threshold is also set, which is designated as the minimum water level threshold; this provides a reference for determining whether there is water in the vacuum tube in extremely cold environments.

[0061] As a specific embodiment, the temperature threshold can be set in the range of -20°C to -40°C according to the actual temperature. The different water levels are set as a percentage of the highest water level when the header is full, and the first water temperature threshold is 0%.

[0062] S106, the MCU processing module collects the actual heating temperature and compares it with the temperature threshold; if it is not less than the temperature threshold, the MCU processing module maintains the current operating state of the solar heating control module;

[0063] In this step, the MCU processing module sequentially acquires, analyzes, or processes data. To confirm the current ambient temperature of the vacuum tube, the MCU processing module first obtains the actual heating temperature. This temperature is then compared with the temperature threshold set in step S104 to determine whether the vacuum tube is in a potentially explosive state. If the MCU processing module confirms that the actual heating temperature is not less than the temperature threshold, the vacuum tube is safe. At this point, the solar heating control module only needs to maintain its current operating state to ensure water supply to the user.

[0064] S108. If the actual heating temperature is less than the temperature threshold, the MCU processing module collects the actual water level value of the header and compares it with the first water level threshold; if the actual water level value is equal to the first water level threshold, the MCU processing module maintains the current operating state of the solar heating control module;

[0065] In this step, if the actual heating temperature is lower than the temperature threshold, it indicates that the vacuum tube is in an environment prone to explosion. This triggers the MCU processing module to collect the actual water level in the header and compare it with the first water level threshold to determine whether there is water in the vacuum tube. If it is equal to the first water level threshold, the vacuum tube is empty, and the solar heating control module can remain in its original state.

[0066] S110. If the actual water level value is not equal to the first water level threshold, the MCU processing module controls the header to discharge the water in the header and the vacuum tube into the hot water tank until the actual water level value of the header is equal to the first water level threshold.

[0067] In this step, if the actual water level is not equal to the first water level threshold, the water in the water tank needs to be drained to prevent it from freezing and cracking due to the shrinkage effect of the stored water, thereby preventing cold damage to the solar heating control module.

[0068] Since the main function of the solar heating control module is to meet the user's water demand, as an optional embodiment, before the vacuum tube is emptied, a corresponding time trigger condition can be set to simultaneously prevent the vacuum tube from bursting and ensure user needs. The specific steps include:

[0069] S110.1. Setting a first time range;

[0070] In this step, the first time range can be set separately or simultaneously in step S104. The specific range can be set according to the user's water demand, such as 6:00 to 20:00 on the same day.

[0071] S110.2. If the actual water level value of the header is not equal to the first water level threshold, the MCU processing module collects the actual time value; if the time value is within the set first time range, the MCU processing module maintains the current operating state of the solar heating control module;

[0072] In this step, if it is within the first time range, it indicates that the user needs water, and the user is controlled to maintain the current motion state.

[0073] S110.3. If the time value is not within the set first time range, the MCU processing module controls the header to drain the water in the header and the vacuum tube into the hot water tank until the actual water level value of the header is equal to the first water level threshold.

[0074] In extremely cold conditions, frozen pipes may occur even within the user's water demand timeframe. Therefore, to ensure the long-term use of the solar heating control module, as an optional embodiment, when the explosive pipe situation is within the set first timeframe, a corresponding manual trigger condition can be added. In this case, the corresponding step S110.2 is:

[0075] S110.2', if the actual water level value of the header is not equal to the first water level threshold, the actual time value is collected through the MCU processing module; if the time value is within the set first time range, the corresponding alarm information is sent to the user through the MCU processing module, and when the user finishes using water, the user manually triggers the drainage.

[0076] At this time, the user's needs for water use and equipment security are met to the greatest extent possible.

[0077] The above control process completes the antifreeze control when the ambient temperature is too low. On the one hand, it prevents the vacuum tube from bursting, and on the other hand, it ensures that the water temperature in the hot water tank meets the water demand of the user.

[0078] Since the heat collecting group is drained when the temperature is extremely low, it is necessary to add water to it when the operating conditions of the solar heating control module are met to prevent the vacuum tube from being exposed to the sun and to meet user needs. The specific steps are as follows:

[0079] S112. Set a temperature difference threshold and a second water level threshold; the temperature difference threshold is a set value of the temperature difference between the heating temperature of the vacuum tube and the heating temperature in the hot water tank, and the second water level threshold is a target water level of the header;

[0080] In this step, since the water in the vacuum tube comes from the hot water tank and the heating temperature is the ambient temperature, a threshold value for the difference between the heating temperature and the heating temperature is set to provide a reference for the actual water temperature during water filling, preventing a large temperature difference from causing the vacuum tube to burst when water rushes into it.

[0081] In this step, the second water level threshold is generally set by default to the highest water level when the header is full, that is, 100%. It can also be set according to the user's actual water consumption, such as 30%, 50% or 80%.

[0082] S114, the MCU processing module collects the actual heating temperature and the heating temperature; and compares the actual temperature difference between the two with the temperature difference threshold; if the actual temperature difference is greater than the temperature difference threshold, the MCU processing module maintains the current operating state of the solar heating control module;

[0083] In this step, if the actual temperature difference is greater than the temperature difference threshold, it indicates that the ambient temperature is too low. If the water in the hot water tank rushes into it, it may cause the vacuum tube to expand due to heat and burst instantly. At this time, the solar heating control module needs to remain in its current state, that is, the empty state.

[0084] S116. If the actual temperature difference is not greater than the temperature difference threshold, the MCU processing module collects the actual water level value in the header; if the actual water level value is not less than the second water level threshold, the MCU processing module maintains the solar heating control module in the current operating state;

[0085] In this step, if the actual temperature difference is not greater than the temperature difference threshold, it indicates that the working environment of the solar heating control module has been met, and the water level detection is performed. If the actual water level is found to be not lower than the second water level threshold, it indicates that the water volume at this time has met the usage demand and no further water is needed.

[0086] S118. If the actual water level value is less than the second water level threshold, the MCU processing module is used to fill the header with water until the actual water level is equal to the second water level threshold.

[0087] In this step, when the actual water level is less than the second water level threshold, it indicates that the current amount of hot water is too small and water needs to be added until the user's water demand is met.

[0088] In order to prevent the risk of sudden environmental changes during the water supply process to the operation of the solar heating control module, as an optional implementation method, a corresponding water supply duration trigger condition is added. The specific steps are as follows:

[0089] S118.1. Set the water supply time threshold;

[0090] In this step, when the second water level threshold is set, the water supply time threshold is automatically calculated by the calculation module of the solar heating control module based on the actual water volume.

[0091] S118.2. When the header tank is being filled with water, the MCU processing module obtains the actual filling time and compares it with the filling time threshold. If the actual filling time is greater than the filling time threshold, it is again determined whether the actual heating temperature is less than the heating threshold.

[0092] In this step, factors that may affect the water supply time include a malfunction of the water supply solenoid valve, temporary adjustments to the water supply pipe flow rate by the user, or low ambient temperature. Therefore, to ensure that the abnormality is not caused by low ambient temperature, it is necessary to re-test the heating temperature.

[0093] S118.3. If the actual heating temperature is lower than the heating threshold, the water supply to the junction box is stopped through the MCU processing module.

[0094] In this step, if the heating temperature is detected again to be lower than the heating threshold, it indicates that continuing to fill water may cause the risk of pipe explosion, so the water filling process needs to be stopped.

[0095] As an optional implementation method, in order to match the water supply and heating process with the user's water demand, a time trigger condition is also set during the water supply process. The specific steps are:

[0096] S118.1', set the second time range;

[0097] In this step, since emptying and filling constitute a dynamic cycle, the second time range can be preferably set to be consistent with the first time range in step S110.1, such as 6:00 to 20:00 on the same day.

[0098] S118.2': If the actual water level value of the header is less than the second water level threshold, the MCU processing module collects the actual time value; if the time value is not within the set second time range, the MCU processing module maintains the current operating state of the solar heating control module;

[0099] S118.3′: If the time value is within the set second time range, the header is filled with water through the MCU processing module until the actual water level of the header is equal to the second water level threshold.

[0100] From the above implementation process, it can be seen that the control method not only prevents the vacuum tube from bursting in a severe cold environment, but also enables it to always meet the user's water needs by draining water when the ambient temperature is too low and filling water when the temperature meets the working conditions of the vacuum tube through a self-circulation control process.

[0101] The intelligent antifreeze control system of the solar heating control module disclosed in the present invention will be further specifically introduced below with reference to the embodiments shown in the accompanying drawings.

[0102] like Figure 2As shown, the control system includes a vacuum tube, a header and a hot water tank, and an MCU processing module that cooperates with them. The vacuum tube is connected to the header, and the header and the hot water tank are circulated through an exhaust pipe and a water supply pipe. During operation, the vacuum tube is irradiated by sunlight, causing the water temperature inside to rise. Based on the principle that hot water floats and cold water sinks, the heated hot water enters the header and then the hot water tank to meet the user's water demand. The exhaust pipe is used to drain the heat collection group in a severely cold environment, and the water supply pipe is used to supply water to the heat collection group under conditions that meet the working environment.

[0103] The MCU processing module is used to control the drainage and water supply processes of the solar array. It stores the corresponding temperature thresholds, temperature difference thresholds, first water level thresholds, and second water level thresholds. The temperature threshold is the heating temperature threshold, the temperature difference threshold is the set value of the difference between the heating temperature and the heating temperature, the first water level threshold is the minimum water level of the header, and the second water level threshold is the target water level set by the header based on user needs.

[0104] In order to enable the MCU processing module to collect corresponding temperatures for analyzing the working environment of the heat collection group, a first temperature sensor is provided on the vacuum tube and connected to the first input terminal of the MCU processing module for collecting the actual heating temperature. A second temperature sensor is provided on the header and connected to the second input terminal of the MCU processing module for collecting the actual header temperature. A third temperature sensor is provided on the hot water tank and connected to the third input terminal of the MCU processing module for collecting the actual heating temperature. A water level sensor is also provided on the header and connected to the fourth input terminal of the MCU processing module for collecting the actual water level value.

[0105] In order to take corresponding measures according to the analysis results, the first output end of the MCU processing module is connected to the solenoid valve on the drain pipe, and the second output end is connected to the solenoid valve on the water supply pipe.

[0106] As an optional embodiment, the control system further includes a clock module. The control system stores the first time range, the second time range, and the water supply duration threshold. The clock module is connected to the fifth input terminal of the MCU processing module to collect actual time values.

[0107] In order to expand the application scenarios of the control system, it also includes a heating water tank. The heating water tank is connected to the hot water tank and is used for indoor heating.

[0108] While the present invention has been disclosed above with reference to preferred embodiments, this is not intended to limit the present invention. Persons skilled in the art will readily appreciate that various modifications and variations can be made without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the claims.

Claims

1. An intelligent antifreeze control method for a solar heating control module, characterized in that: include: Including the drainage process, including the following steps: Power on the solar heating control module; Set a temperature threshold and a first water level threshold. The temperature threshold is the minimum threshold of the heating temperature, and the heating temperature is defined as the temperature of the vacuum tube; the first water level threshold is the lowest water level of the header; The MCU processing module collects the actual heating temperature and compares it with the temperature threshold; If it is not less than the temperature threshold, the MCU processing module will keep the solar heating control module in the current operating state; If the actual heating temperature is lower than the temperature threshold, the MCU processing module collects the actual water level value of the header and compares it with the first water level threshold; If it is equal to the first water level threshold, the MCU processing module is used to keep the solar heating control module in the current operating state; If the actual water level value of the header is not equal to the first water level threshold, the MCU processing module collects the actual time value; if the time value is within the set first time range, the MCU processing module maintains the current operating state of the solar heating control module; wherein, the setting is based on the user's water demand; If the time value is not within the set first time range, the MCU processing module controls the header to drain the water in the header and the vacuum tube into the hot water tank until the actual water level value of the header equals the first water level threshold; Including the water supply process, including the following steps: Set a temperature difference threshold and a second water level threshold; the temperature difference threshold is the temperature difference set value between the heating temperature of the vacuum tube and the heating temperature in the hot water tank, and the second water level threshold is the target water level of the header; The MCU processing module collects the actual heating temperature and the heating temperature; and compares the actual temperature difference between the two with the temperature difference threshold; if the actual temperature difference is greater than the temperature difference threshold, the MCU processing module keeps the solar heating control module in the current operating state; If the actual temperature difference is not greater than the temperature difference threshold, the actual water level value in the header is collected by the MCU processing module. If the actual water level value is not less than the second water level threshold, the solar heating control module is kept in the current operating state by the MCU processing module. If the actual water level is less than the second water level threshold, the MCU processing module will fill the header with water until the actual water level is equal to the second water level threshold. When the header box is filled with water, the actual water filling time is obtained through the MCU processing module and compared with the water filling time threshold; if it is greater than the water filling time threshold, it is determined whether the actual heating temperature is less than the heating threshold; If the actual heating temperature is lower than the heating threshold, the MCU processing module stops supplying water to the junction box.

2. The intelligent antifreeze control method of the solar heating control module according to claim 1, characterized in that: The second water level threshold is the highest water level when the header is full.

3. The intelligent antifreeze control method of the solar heating control module according to claim 1, characterized in that: include: Set a second time range; If the actual water level value of the header is less than the second water level threshold, the actual time value is collected by the MCU processing module; If the time value is not within the set second time range, the MCU processing module is used to keep the solar heating control module in the current operating state; If the time value is within the set second time range, the header is filled with water through the MCU processing module until the actual water level of the header is equal to the second water level threshold.

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