Heat exchange liquid supply method, system and heat exchange equipment

Abstract

The present invention discloses a heat exchange and liquid supply method, system and heat exchange equipment, which relate to the technical field of heat generating devices, including obtaining gas parameters exhausted by a wall-mounted boiler, a first water temperature parameter during exhaust, structural parameters of a heating pipe, exhaust time and a first water pressure parameter during the exhaust time; estimating a water pressure drop based on the above parameters; calculating an actual water pressure drop based on the exhaust time and the first water pressure parameter during the exhaust time; if the actual water pressure drop is greater than the estimated water pressure drop, controlling the water in the heating pipe to stand for a first period of time; within the first period of time, recording second water pressure parameters at different time points, analyzing the water pressure change trend, and judging whether there is a leak in the heating pipe, and displaying a warning symbol if it is judged that there is an abnormality in the heating pipe; if the actual water pressure drop is less than or equal to the estimated water pressure drop, then when the first water pressure parameter is less than a set water replenishment pressure threshold, opening an electric water replenishment valve for water replenishment.

Description

Technical Field

[0001] The present invention relates to the technical field of heat generating devices, and in particular to a heat exchange and liquid supply method, system and heat exchange equipment. Background Art

[0002] In modern heating systems, wall-mounted boilers are widely used in various residential and commercial buildings as an efficient and convenient heating device. The water replenishment operation of the wall-mounted boiler is one of the key links to maintain the normal operation of the heating system. Its core purpose is to ensure the stability of the pressure in the heating system and avoid the decrease in heating efficiency or even system failure caused by low pressure.

[0003] Traditional water replenishment methods for wall-mounted boilers mostly rely on manual operation, that is, by observing the pressure gauge of the heating system, judging whether manual water replenishment is needed. When the pressure gauge shows that the system pressure is lower than the preset value, the operator needs to open the electric water replenishment valve and inject an appropriate amount of water into the system to restore the system to a normal pressure level. However, this manual water replenishment method has many inconveniences. It not only increases the complexity of operation, but may also cause untimely or excessive water replenishment due to human negligence, thereby affecting the stability and safety of the heating system.

[0004] In order to overcome the limitations of manual water filling, wall-mounted boiler products equipped with automatic electric water filling valves have gradually appeared on the market. The automatic electric water filling valve can automatically adjust the water filling amount according to the changes in system pressure, thereby realizing the automation and intelligence of water filling operation. However, the introduction of the automatic electric water filling valve also brings some new problems. In particular, when there is a leak in the heating system, the continuous water filling of the automatic electric water filling valve will cover up the leak. Summary of the invention

[0005] In order to solve the technical problems existing in the prior art, the present invention provides a heat exchange and liquid supply method, system and heat exchange equipment.

[0006] The technical solution adopted by the present invention is:

[0007] The first aspect of the present application provides a heat exchange liquid supply method, comprising the following contents:

[0008] Obtain the gas parameters exhausted by the wall-mounted boiler, the first water temperature parameters during exhaust, the structural parameters of the heating pipe, the exhaust time, and the first water pressure parameters during the exhaust time.

[0009] The water pressure drop is estimated based on the gas parameters, water temperature parameters and structural parameters of the heating pipes.

[0010] The actual water pressure drop value is calculated based on the exhaust time and the first water pressure parameter during the exhaust time.

[0011] The actual water pressure drop value is compared with the estimated water pressure drop value. If the actual water pressure drop value is greater than the estimated water pressure drop value, the water in the heating pipe is controlled to stand still for a first period of time.

[0012] During the first time period, the second water pressure parameter at different time points is recorded.

[0013] The water pressure variation trend is analyzed based on the second water pressure parameter at different time points, and whether there is an abnormality in the heating pipe is determined based on the water pressure variation trend. If it is determined that there is an abnormality in the heating pipe, a warning symbol is displayed.

[0014] If the actual water pressure drop value is less than or equal to the estimated water pressure drop value, it is determined whether the first water pressure parameter is less than the set water replenishment pressure threshold. When the first water pressure parameter is less than the set water replenishment pressure threshold, the electric water replenishment valve is opened for water replenishment.

[0015] Preferably, the estimated water pressure drop value based on the gas parameters, water temperature parameters and structural parameters of the heating pipe specifically includes the following contents:

[0016] The volume of the heating pipe is calculated based on the structural parameters of the heating pipe, wherein the structural parameters of the heating pipe include the total length of the pipe and the diameter of the pipe.

[0017] The gas parameters, water temperature parameters and the volume of the heating pipe are input into a preset water pressure drop estimation model to obtain an estimated water pressure drop value; wherein the gas parameters include the exhaust volume, and the water temperature parameters include the average water temperature during the exhaust time and the temperature difference between the beginning and the end of the exhaust.

[0018] Preferably, the preset water pressure drop prediction model is:

[0019] ΔP=(k1·V1·T+k2·ΔT) / V2

[0020] Among them, ΔP represents the estimated water pressure drop, V1 represents the exhaust volume, k1 represents the gas expansion coefficient, T represents the average water temperature during the exhaust time, k2 represents the thermal contraction coefficient, ΔT represents the temperature difference between the beginning and the end of the exhaust; V2 represents the volume of the heating pipe.

[0021] Preferably, the water pressure variation trend is analyzed based on the second water pressure parameter at different time points, and whether the heating pipe is abnormal is determined based on the water pressure variation trend. If it is determined that the heating pipe is abnormal, the warning symbol displayed includes the following contents:

[0022] Arranging the second water pressure parameters recorded at different time points within the first time period in chronological order;

[0023] Calculating the difference between adjacent second water pressure parameters to determine the direction and magnitude of water pressure change;

[0024] If the water pressure shows a downward trend during the first time period and the decline exceeds a preset threshold, it is determined that there is an abnormality in the heating pipeline;

[0025] When it is determined that there is an abnormality in the heating pipe, a warning symbol will be displayed.

[0026] Preferably, when the first water pressure parameter is less than a set water replenishment pressure threshold, opening the electric water replenishment valve to replenish water includes the following:

[0027] The water replenishment pressure threshold is divided into a first-level sub-water replenishment pressure threshold, a second-level sub-water replenishment pressure threshold, a third-level sub-water replenishment pressure threshold and a fourth-level sub-water replenishment pressure threshold; wherein the first-level sub-water replenishment pressure threshold is greater than the second-level sub-water replenishment pressure threshold, the second-level sub-water replenishment pressure threshold is greater than the third-level sub-water replenishment pressure threshold, and the third-level sub-water replenishment pressure threshold is greater than the fourth-level sub-water replenishment pressure threshold;

[0028] When the first water pressure parameter is less than the first-level sub-water replenishment pressure threshold and greater than the second-level sub-water replenishment pressure threshold, the electric water replenishment valve is adjusted to a first opening within a preset first time;

[0029] When the first water pressure parameter is less than or equal to the second-level sub-water replenishment pressure threshold and greater than the third-level sub-water replenishment pressure threshold, adjusting the electric water replenishment valve from the first opening to the second opening within a preset second time;

[0030] When the first water pressure parameter is less than or equal to the third-level sub-water replenishment pressure threshold and greater than the fourth-level sub-water replenishment pressure threshold, the electric water replenishment valve is adjusted to a third opening within a preset third time; wherein the first opening is smaller than the second opening and smaller than the third opening.

[0031] Preferably, when the first water pressure parameter is less than or equal to the third-level sub-water replenishment pressure threshold and greater than the fourth-level sub-water replenishment pressure threshold, the electric water replenishment valve is adjusted to the third opening within a preset time and the following contents are also included:

[0032] When the first water pressure parameter is less than or equal to the second-level sub-water replenishment pressure threshold and greater than the third-level sub-water replenishment pressure threshold, adjusting the electric water replenishment valve from the third opening to the second opening within a preset fourth time;

[0033] When the first water pressure parameter is less than the first-level sub-water replenishment pressure threshold and greater than the second-level sub-water replenishment pressure threshold, adjusting the electric water replenishment valve from the second opening to the first opening within a preset fifth time;

[0034] When the first water pressure parameter is greater than or equal to the first-level sub-water replenishment pressure threshold, the electric water replenishment valve is closed.

[0035] A second aspect of the present application provides a heat exchange liquid supply system, which uses the above-mentioned heat exchange liquid supply method, including:

[0036] A data acquisition module is used to obtain gas parameters exhausted by the wall-mounted boiler, first water temperature parameters during exhaust, structural parameters of the heating pipe, exhaust time, and first water pressure parameters during the exhaust time.

[0037] An estimation module is used to estimate the water pressure drop value based on the gas parameters, water temperature parameters and structural parameters of the heating pipeline.

[0038] A calculation module is used to calculate an actual water pressure drop value based on the exhaust time and a first water pressure parameter within the exhaust time.

[0039] A comparison module, the comparison module is used to compare the actual water pressure drop value and the estimated water pressure drop value; if the actual water pressure drop value is greater than the estimated water pressure drop value.

[0040] The water pump control module is used to control the water in the heating pipe to stand for a first period of time when the actual water pressure drop value is less than or equal to the estimated water pressure drop value.

[0041] A recording module is used to record the second water pressure parameter at different time points within a first time period.

[0042] An analysis module is used to analyze the water pressure variation trend based on the second water pressure parameter at different time points.

[0043] A judgment module is used to judge whether there is an abnormality in the heating pipeline based on the water pressure change trend.

[0044] The early warning display module is used to display an early warning symbol if it is determined that there is an abnormality in the heating pipeline.

[0045] The electric water replenishment valve control module is used to open the electric water replenishment valve for replenishing water when the first water pressure parameter is less than a set water replenishment pressure threshold.

[0046] The third aspect of the present application provides a heat exchange device, including: a wall-mounted boiler, in which a controller, a water pump and a heat exchange device are arranged, the water inlet of the heat exchange device is used to be connected to the water outlet of an external water supply system through an electric water supply valve, the water outlet of the heat exchange device is used to be connected to the water inlet of a heating pipe, the water inlet of the heat exchange device is also used to be connected to the return water outlet of the heating pipe, the water pump is arranged on the pipeline between the water inlet of the heat exchange device and the return water outlet of the heating pipe, and the above-mentioned heat exchange and liquid supply method is applied.

[0047] The beneficial effects of the present invention are at least one of the following: when the actual water pressure drop value is greater than the estimated water pressure drop value, the water in the heating pipe is controlled to stand for a first period of time, and the second water pressure parameters at different time points are recorded, and the water pressure change trend is analyzed based on these parameters to determine whether there is an abnormality in the heating pipe, so that possible leakage and other abnormal conditions in the heating pipe can be discovered in time, avoiding the leakage phenomenon being covered up by continuous water replenishment, thereby improving the safety and stability of the heating system.

[0048] When the actual water pressure drop is less than or equal to the estimated water pressure drop, it is further determined whether the first water pressure parameter is less than the set water replenishment pressure threshold. When it is less than the threshold, the electric water replenishment valve is opened for water replenishment, thereby realizing the function of automatic water replenishment according to the actual pressure of the system, ensuring the stability of the pressure in the heating system, avoiding the decrease in heating efficiency or even system failure due to low pressure, and also avoiding the problem of untimely or excessive water replenishment due to human negligence. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 This is a flow chart of the method of Embodiment 1 of the present application;

[0050] Figure 2 This is a system block diagram of Example 2 of the present application. DETAILED DESCRIPTION

[0051] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0052] Most of the existing wall-mounted boilers do not automatically refill water, but manually refill water, because the wall-mounted boiler refill water is mostly to refill water for the heating system. Whether the wall-mounted boiler needs to be refilled depends on whether the pressure gauge is lower than a certain value. Since there are a large number of bubbles in the water channel of the heating system, when the heating system is exhausted or leaks due to circulation, the value of the pressure gauge on the wall-mounted boiler will drop. If the pressure drop is caused by leakage, it is necessary to find the leak point in time, repair it, and then refill water to the normal pressure value. The water shortage fault is eliminated, and the wall-mounted boiler can operate normally. If the wall-mounted boiler automatically refills water, when a leak occurs, the water pressure decreases, and the electric refill valve automatically opens to refill water. It is impossible to judge whether there is a leak point by the value of the pressure gauge on the wall-mounted boiler, and the water in the heating pipe will continue to leak from the leak point.

[0053] In order to solve the above problems, the first embodiment provides a heat exchange liquid supply method, such as Figure 1 As shown, the following steps are included:

[0054] Step 100, obtaining gas parameters exhausted by the wall-mounted boiler, first water temperature parameters during exhaust, structural parameters of the heating pipe, exhaust time, and first water pressure parameters during the exhaust time.

[0055] It should be noted that it is preferred to obtain the gas parameters exhausted by the wall-mounted boiler in a non-combustion state. For reference, the exhaust volume can be measured by a gas mass flow meter, the first water temperature parameter during exhaust can be measured by a temperature sensor, the structural parameters of the heating pipe can be obtained through a database, and after the heating system is installed, the total length of the pipe, the pipe diameter and other parameters are entered into the database. The exhaust time can be recorded by a timer, and the first water pressure parameter during the exhaust time can be obtained by a water pressure sensor.

[0056] Step 200, estimating the water pressure drop value based on the gas parameters, water temperature parameters and structural parameters of the heating pipe.

[0057] In a possible implementation, different gas parameters, water temperature parameters and heating pipe structure parameter combinations can be simulated in advance by means of pre-experimental simulation, and multiple experiments are conducted to record the water pressure drop value corresponding to each experiment. For example, the exhaust volume, water temperature, pipe diameter and other parameters are changed, and the normal water pressure drop under various conditions is measured respectively. According to the experimental data, an empirical table is established, and the rows and columns of the table represent different parameter ranges respectively, and each cell in the table records the estimated water pressure drop value under the corresponding parameter combination. For example, the rows of the table can be divided according to different intervals of the exhaust volume, and the columns can be divided according to different intervals of the water temperature. The value in each cell is the estimated water pressure drop value obtained under the exhaust volume and water temperature combination, combined with the specific heating pipe structure parameters. When the water pressure drop value needs to be estimated, the corresponding estimated value is found in the empirical table according to the current gas parameters, water temperature parameters and heating pipe structure parameters. If the current parameter value is not within a certain interval in the table, it can be estimated by interpolation method and other methods. For example, if the current exhaust volume is between two adjacent exhaust volume intervals in the table, the corresponding estimated water pressure drop value can be calculated by linear interpolation.

[0058] In another possible implementation manner, the estimating the water pressure drop value based on the gas parameters, the water temperature parameters and the structural parameters of the heating pipe specifically includes the following contents:

[0059] The volume of the heating pipe is calculated based on the structural parameters of the heating pipe, wherein the structural parameters of the heating pipe include the total length of the pipe and the diameter of the pipe.

[0060] For reference, the volume of the heating pipe can be calculated using the cylinder volume formula. For example, if the total length of the pipe is , the diameter of the pipe is d, . V2 represents the volume of the heating pipe.

[0061] The gas parameters, water temperature parameters and the volume of the heating pipe are input into a preset water pressure drop estimation model to obtain an estimated water pressure drop value; wherein the gas parameters include the exhaust volume, and the water temperature parameters include the average water temperature during the exhaust time and the temperature difference between the beginning and the end of the exhaust.

[0062] According to the thermodynamic principle and fluid mechanics analysis, the preset water pressure drop prediction model is:

[0063] ΔP=(k1·V1·T+k2·ΔT) / V2

[0064] Among them, ΔP represents the estimated water pressure drop, V1 represents the exhaust volume, k1 represents the gas expansion coefficient, and its value range is 0.02-0.05, T represents the average water temperature during the exhaust time, k2 represents the thermal contraction coefficient, and its value range is 0.15-0.3, ΔT represents the temperature difference between the beginning and the end of exhaust; V2 represents the volume of the heating pipe.

[0065] It should be noted that based on the ideal gas law, the influence of the relationship between gas volume and temperature on the system pressure during the exhaust process is considered. The k1 value is determined by fitting experimental data, and k1=0.035 is taken for a typical wall-mounted boiler system.

[0066] k2=β·E, based on the volume expansion coefficient of water β=2.1×10 -4 / K, where E is the system elastic modulus (taken as 1.5×10³kPa), so k2=β·E≈0.315kPa / K. Through actual system testing, it is found that the theoretical value of 0.315 overestimates the pressure change, and it is corrected to 0.25 to be more in line with the measured data. After correction, k2=0.25 is taken.

[0067] The coefficient of volume expansion β represents the relative change in volume for each 1 Kelvin increase in temperature. The elastic modulus E is a measure of the material's ability to resist volume compression and is defined as the ratio of the pressure change to the volume strain.

[0068] Step 300: Calculate the actual water pressure drop value based on the exhaust time and the first water pressure parameter during the exhaust time.

[0069] For reference, record the initial water pressure at the beginning of exhaust and the lowest water pressure recorded at the end of exhaust, calculate the difference between the two, and get the actual water pressure drop value.

[0070] Step 400, comparing the actual water pressure drop value and the estimated water pressure drop value.

[0071] If the actual water pressure drop value is greater than the estimated water pressure drop value, then step 500 is performed. If the actual water pressure drop value is less than or equal to the estimated water pressure drop value, then step 700 is performed.

[0072] Step 500, controlling the water in the heating pipe to stand for a first period of time, and recording the second water pressure parameters at different time points during the first period of time.

[0073] Step 600, analyzing the water pressure variation trend based on the second water pressure parameter at different time points, and judging whether there is an abnormality in the heating pipe based on the water pressure variation trend. If it is judged that there is an abnormality in the heating pipe, a warning symbol is displayed.

[0074] In a possible implementation, the water pressure variation trend is analyzed based on the second water pressure parameter at different time points, and whether the heating pipe is abnormal is determined based on the water pressure variation trend. If it is determined that the heating pipe is abnormal, the warning symbol displayed includes the following:

[0075] The second water pressure parameters recorded at different time points within the first time period are arranged in chronological order.

[0076] The difference between adjacent second water pressure parameters is calculated to determine the direction and magnitude of water pressure change.

[0077] If the water pressure shows a downward trend during the first time period and the decrease exceeds a preset threshold, it is determined that there is an abnormality in the heating pipe.

[0078] When it is determined that there is an abnormality in the heating pipe, a warning symbol will be displayed.

[0079] Step 700, determining whether the first water pressure parameter is less than a set water replenishment pressure threshold, when the first water pressure parameter is less than the set water replenishment pressure threshold, opening the electric water replenishment valve for water replenishment.

[0080] In summary, the gas parameters exhausted by the wall-mounted boiler, the first water temperature parameters during exhaust, the structural parameters of the heating pipe, the exhaust time, and the first water pressure parameters during the exhaust time are comprehensively acquired to monitor the heating system from multiple dimensions. Compared with the traditional monitoring method that only relies on a single pressure gauge, it can more accurately reflect the actual operating status of the system.

[0081] The water in the heating pipe is controlled to stand for a period of time, the second water pressure parameter at different time points is recorded, and the water pressure change trend is analyzed. By judging whether the water pressure is decreasing and whether the decrease exceeds the preset threshold, it is determined whether there is an abnormality in the heating pipe. This judgment method based on trend analysis is more scientific and accurate, and can timely discover potential problems such as pipeline leakage, and remind users to take corresponding measures by displaying warning symbols.

[0082] In the prior art, a pressure display screen is provided on the side wall of the wall-mounted boiler, and a pointer and a red water pressure area, a green water pressure area and a white water pressure area are displayed on the pressure display screen. For example, 0-1 bar is a red water pressure area, 1-1.3 bar is a green water pressure area, and greater than 1.3 bar is a white water pressure area. When the pointer falls in the red water pressure area, the water pump is turned on to replenish water, and the water replenishment is stopped when the pointer falls in the green water pressure area.

[0083] However, this one-time water replenishment strategy will cause a large amount of water replenishment at one time, which will cause the system pressure to rise rapidly in a short period of time. From the pressure display, the pointer will quickly cross from the red area to the green area. During the one-time water replenishment, a large amount of water will flow into the heating system at a high flow rate after the water pump is turned on. When the high-speed water flow flows in the pipe, it will violently impact and collide with the pipe wall and the original water in the system, causing the gas originally dissolved in the water to precipitate and form a large number of bubbles.

[0084] After the water cycle has run for a period of time, the water pressure will drop again, and water often needs to be replenished again. Each time water is replenished, a large number of bubbles may be generated again due to the water flow impact, pressure changes, and other factors mentioned above. These newly generated bubbles will cause the water pressure to drop again in the subsequent water cycle, thus forming a cycle of "large amount of water replenishment-large amount of bubbles-water pressure drops after a period of water circulation-large amount of water replenishment again".

[0085] In order to reduce the bubbles generated in the heating pipe during the water replenishment process as much as possible, in a possible implementation manner, judging whether the first water pressure parameter is less than a set water replenishment pressure threshold, when the first water pressure parameter is less than the set water replenishment pressure threshold, opening the electric water replenishment valve for water replenishment specifically includes the following contents:

[0086] The water replenishment pressure threshold is divided into a first-level sub-water replenishment pressure threshold, a second-level sub-water replenishment pressure threshold, a third-level sub-water replenishment pressure threshold and a fourth-level sub-water replenishment pressure threshold; among which the first-level sub-water replenishment pressure threshold is greater than the second-level sub-water replenishment pressure threshold, the second-level sub-water replenishment pressure threshold is greater than the third-level sub-water replenishment pressure threshold, and the third-level sub-water replenishment pressure threshold is greater than the fourth-level sub-water replenishment pressure threshold.

[0087] For reference, the water replenishment pressure threshold is divided into a first-level sub-water replenishment pressure threshold, a second-level sub-water replenishment pressure threshold, a third-level sub-water replenishment pressure threshold and a fourth-level sub-water replenishment pressure threshold, for example, the first level is 1.3 bar, the second level is 1.1 bar, the third level is 0.9 bar, and the fourth level is 0.7 bar.

[0088] When the first water pressure parameter is less than the first-level sub-water replenishment pressure threshold and greater than the second-level sub-water replenishment pressure threshold, the electric water replenishment valve is adjusted to a first opening within a preset first time.

[0089] For reference, at the beginning of exhaust, because the gas content in the water is relatively high, the first water pressure parameter continues to decrease. When the first water pressure parameter is less than the first-level sub-water replenishment pressure threshold, the electric water replenishment valve is adjusted to the first opening within the preset first time. Among them, the first opening is relatively small, and a smaller opening can slowly replenish water to avoid excessive water flow impact and bubble generation.

[0090] When the first water pressure parameter is less than or equal to the second-level sub-water replenishment pressure threshold and greater than the third-level sub-water replenishment pressure threshold, the electric water replenishment valve is adjusted from the first opening to the second opening within a preset second time.

[0091] For reference, since the first opening is relatively small and the water replenishment speed is relatively slow, when a large amount of gas is discharged in the water, even if the electric water replenishment valve is adjusted to the first opening for water replenishment within the preset first time, the first water pressure parameter will still drop. When the first water pressure parameter is less than or equal to the second-level sub-water replenishment pressure threshold and greater than the third-level sub-water replenishment pressure threshold, the electric water replenishment valve is adjusted from the first opening to the second opening within the preset second time. As the water pressure decreases, it may be necessary to appropriately increase the water replenishment amount, but still maintain a relatively gentle water replenishment speed to prevent excessive bubbles.

[0092] When the first water pressure parameter is less than or equal to the third-level sub-water replenishment pressure threshold and greater than the fourth-level sub-water replenishment pressure threshold, the electric water replenishment valve is adjusted to a third opening within a preset third time; wherein the first opening is smaller than the second opening and smaller than the third opening.

[0093] For reference, when the first water pressure parameter is less than or equal to the third-level sub-water replenishment pressure threshold and greater than the fourth-level sub-water replenishment pressure threshold, it means that the water pressure is already at a relatively low level, and the previous water replenishment with a smaller opening and a relatively gentle speed is not enough to quickly increase the water pressure to an appropriate range. Therefore, the electric water replenishment valve is adjusted to the third opening within the preset third time, because it is necessary to appropriately speed up the water replenishment speed to meet the system pressure requirements. Although the third opening is larger than the first and second openings, since it is based on a certain degree of water replenishment in the previous part and the opening is gradually increased, it will not cause the water flow to produce a violent impact and a large number of bubbles like the traditional one-time large-scale water replenishment.

[0094] Considering that as the gas in the heating pipe is discharged, the water pressure will gradually decrease or stop decreasing, in a possible implementation manner, when the first water pressure parameter is less than or equal to the third-level sub-water replenishment pressure threshold and greater than the fourth-level sub-water replenishment pressure threshold, the electric water replenishment valve is adjusted to the third opening within a preset time, and the following contents are also included:

[0095] When the first water pressure parameter is less than or equal to the second-level sub-water replenishment pressure threshold and greater than the third-level sub-water replenishment pressure threshold, the electric water replenishment valve is adjusted from the third opening to the second opening within a preset fourth time.

[0096] For reference, as the water replenishment process continues, the gas in the heating pipe is gradually discharged, and the trend of water pressure drop will gradually slow down or even stop falling. When the first water pressure parameter is less than or equal to the second-level sub-water replenishment pressure threshold and greater than the third-level sub-water replenishment pressure threshold, it means that the system pressure has begun to rise and the gas discharge may be reduced. At this time, adjust the electric water replenishment valve from the third opening to the second opening within the preset fourth time, and appropriately reduce the water replenishment speed to prevent excessive water replenishment from causing excessive system pressure, and at the same time further reduce the bubbles that may be generated by high-speed water flow.

[0097] When the first water pressure parameter is less than the first-level sub-water replenishment pressure threshold and greater than the second-level sub-water replenishment pressure threshold, the electric water replenishment valve is adjusted from the second opening to the first opening within a preset fifth time.

[0098] For reference, when the first water pressure parameter is less than the first-level water replenishment pressure threshold and greater than the second-level water replenishment pressure threshold, it indicates that the system pressure has further recovered and the gas discharge situation has stabilized. At this time, the electric water replenishment valve is adjusted from the second opening to the first opening within the preset fifth time, the water replenishment speed is slowed down again, and fine pressure adjustment is performed to make the system pressure steadily approach and maintain within the appropriate range.

[0099] When the first water pressure parameter is greater than or equal to the first-level sub-water replenishment pressure threshold, the electric water replenishment valve is closed.

[0100] For reference, when the first water pressure parameter is greater than or equal to the first-level sub-water replenishment pressure threshold, it means that the system pressure has reached the ideal state. At this time, the electric water replenishment valve is closed and the water replenishment operation is stopped, so that the water pressure of the heating system is stabilized in a reasonable range.

[0101] In summary, the traditional one-time large-scale water replenishment will cause the high-speed water flow to violently impact the pipeline and the original water, resulting in a large amount of dissolved gas in the water to precipitate and form bubbles. However, this solution gradually adjusts the opening of the electric water replenishment valve in stages, initially replenishing water slowly with a small opening, and then increasing the opening appropriately as the water pressure decreases, and then adjusting the opening according to the recovery of the water pressure. The whole process avoids excessive water flow impact and reduces the generation of bubbles.

[0102] Embodiment 2 of the present application provides a heat exchange liquid supply system, which applies the heat exchange liquid supply method described in embodiment 1, such as Figure 2 As shown, including:

[0103] A data acquisition module is used to obtain gas parameters exhausted by the wall-mounted boiler, first water temperature parameters during exhaust, structural parameters of the heating pipe, exhaust time, and first water pressure parameters during the exhaust time.

[0104] An estimation module is used to estimate the water pressure drop value based on the gas parameters, water temperature parameters and structural parameters of the heating pipeline.

[0105] A calculation module is used to calculate an actual water pressure drop value based on the exhaust time and a first water pressure parameter within the exhaust time.

[0106] A comparison module, the comparison module is used to compare the actual water pressure drop value and the estimated water pressure drop value; if the actual water pressure drop value is greater than the estimated water pressure drop value.

[0107] The water pump control module is used to control the water in the heating pipe to stand for a first period of time when the actual water pressure drop value is less than or equal to the estimated water pressure drop value.

[0108] A recording module is used to record the second water pressure parameter at different time points within a first time period.

[0109] An analysis module is used to analyze the water pressure variation trend based on the second water pressure parameter at different time points.

[0110] A judgment module is used to judge whether there is an abnormality in the heating pipeline based on the water pressure change trend.

[0111] The early warning display module is used to display an early warning symbol if it is determined that there is an abnormality in the heating pipeline.

[0112] The electric water replenishment valve control module is used to open the electric water replenishment valve for replenishing water when the first water pressure parameter is less than a set water replenishment pressure threshold.

[0113] Embodiment 3 of the present application provides a heat exchange device, including: a wall-mounted boiler, wherein a controller, a water pump and a heat exchange device are arranged inside the wall-mounted boiler, the water inlet of the heat exchange device is used to connect with the water outlet of the external water supply system through an electric water supply valve, the water outlet of the heat exchange device is used to connect with the water inlet of the heating pipe, the water inlet of the heat exchange device is also used to connect with the return water outlet of the heating pipe, and the water pump is arranged on the pipeline between the water inlet of the heat exchange device and the return water outlet of the heating pipe. A heat exchange and liquid supply method described in embodiment 1 is applied.

[0114] The above-mentioned embodiments only express the specific implementation of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A heat exchange liquid supply method, characterized in that: Includes the following: Obtaining gas parameters exhausted by the wall-mounted boiler, first water temperature parameters during exhaust, structural parameters of the heating pipe, exhaust time, and first water pressure parameters during exhaust time; Estimate the water pressure drop based on gas parameters, water temperature parameters and structural parameters of the heating pipes; Calculate an actual water pressure drop value based on the exhaust time and a first water pressure parameter within the exhaust time; Comparing the actual water pressure drop value with the estimated water pressure drop value, if the actual water pressure drop value is greater than the estimated water pressure drop value, controlling the water in the heating pipe to stand for a first period of time; During the first time period, recording the second water pressure parameter at different time points; Analyzing the water pressure variation trend based on the second water pressure parameter at different time points, judging whether there is an abnormality in the heating pipe based on the water pressure variation trend, and displaying a warning symbol if it is judged that there is an abnormality in the heating pipe; If the actual water pressure drop value is less than or equal to the estimated water pressure drop value, it is determined whether the first water pressure parameter is less than the set water replenishment pressure threshold value. When the first water pressure parameter is less than the set water replenishment pressure threshold value, the electric water replenishment valve is opened for water replenishment; The estimated water pressure drop value based on gas parameters, water temperature parameters and structural parameters of the heating pipe specifically includes the following contents: Calculating the volume of the heating pipeline based on the structural parameters of the heating pipeline, wherein the structural parameters of the heating pipeline include the total length of the pipeline and the diameter of the pipeline; The gas parameters, water temperature parameters and the volume of the heating pipe are input into a preset water pressure drop estimation model to obtain an estimated water pressure drop value; wherein the gas parameters include the exhaust volume, and the water temperature parameters include the average water temperature during the exhaust time and the temperature difference between the beginning and the end of the exhaust.

2. A heat exchange liquid supply method according to claim 1, characterized in that: The preset water pressure drop prediction model is: ΔP=(k1·V1·T+k2·ΔT) / V2 Among them, ΔP represents the estimated water pressure drop, V1 represents the exhaust volume, k1 represents the gas expansion coefficient, T represents the average water temperature during the exhaust time, k2 represents the thermal contraction coefficient, ΔT represents the temperature difference between the beginning and the end of the exhaust; V2 represents the volume of the heating pipe.

3. A heat exchange liquid supply method according to claim 1, characterized in that: The water pressure variation trend is analyzed based on the second water pressure parameter at different time points, and whether the heating pipe is abnormal is determined based on the water pressure variation trend. If it is determined that the heating pipe is abnormal, the warning symbol displayed includes the following contents: Arranging the second water pressure parameters recorded at different time points within the first time period in chronological order; Calculating the difference between adjacent second water pressure parameters to determine the direction and magnitude of water pressure change; If the water pressure shows a downward trend during the first time period and the decline exceeds a preset threshold, it is determined that there is an abnormality in the heating pipeline; When it is determined that there is an abnormality in the heating pipe, a warning symbol will be displayed.

4. A heat exchange liquid supply method according to claim 1, characterized in that: When the first water pressure parameter is less than the set water replenishment pressure threshold, opening the electric water replenishment valve to replenish water includes the following contents: The water replenishment pressure threshold is divided into a first-level sub-water replenishment pressure threshold, a second-level sub-water replenishment pressure threshold, a third-level sub-water replenishment pressure threshold and a fourth-level sub-water replenishment pressure threshold; wherein the first-level sub-water replenishment pressure threshold is greater than the second-level sub-water replenishment pressure threshold, the second-level sub-water replenishment pressure threshold is greater than the third-level sub-water replenishment pressure threshold, and the third-level sub-water replenishment pressure threshold is greater than the fourth-level sub-water replenishment pressure threshold; When the first water pressure parameter is less than the first-level sub-water replenishment pressure threshold and greater than the second-level sub-water replenishment pressure threshold, the electric water replenishment valve is adjusted to a first opening within a preset first time; When the first water pressure parameter is less than or equal to the second-level sub-water replenishment pressure threshold and greater than the third-level sub-water replenishment pressure threshold, adjusting the electric water replenishment valve from the first opening to the second opening within a preset second time; When the first water pressure parameter is less than or equal to the third-level sub-water replenishment pressure threshold and greater than the fourth-level sub-water replenishment pressure threshold, the electric water replenishment valve is adjusted to a third opening within a preset third time; wherein the first opening is smaller than the second opening and smaller than the third opening.

5. A heat exchange liquid supply method according to claim 4, characterized in that: When the first water pressure parameter is less than or equal to the third-level sub-water replenishment pressure threshold and greater than the fourth-level sub-water replenishment pressure threshold, the electric water replenishment valve is adjusted to the third opening within a preset time, and the following contents are also included: When the first water pressure parameter is less than or equal to the second-level sub-water replenishment pressure threshold and greater than the third-level sub-water replenishment pressure threshold, adjusting the electric water replenishment valve from the third opening to the second opening within a preset fourth time; When the first water pressure parameter is less than the first-level sub-water replenishment pressure threshold and greater than the second-level sub-water replenishment pressure threshold, adjusting the electric water replenishment valve from the second opening to the first opening within a preset fifth time; When the first water pressure parameter is greater than or equal to the first-level sub-water replenishment pressure threshold, the electric water replenishment valve is closed.

6. A heat exchange liquid supply system, characterized in that: A heat exchange liquid supply method according to any one of claims 1 to 5, comprising: A data acquisition module, the data acquisition module is used to obtain gas parameters exhausted by the wall-mounted boiler, first water temperature parameters during exhaust, structural parameters of the heating pipe, exhaust time, and first water pressure parameters during the exhaust time; An estimation module, the estimation module is used to estimate the water pressure drop value based on the gas parameters, water temperature parameters and structural parameters of the heating pipeline; A calculation module, the calculation module is used to calculate an actual water pressure drop value based on the exhaust time and a first water pressure parameter during the exhaust time; A comparison module, the comparison module is used to compare the actual water pressure drop value with the estimated water pressure drop value; if the actual water pressure drop value is greater than the estimated water pressure drop value; a water pump control module, when the actual water pressure drop value is less than or equal to the estimated water pressure drop value, the water pump control module is used to control the water in the heating pipe to stand for a first period of time; A recording module, the recording module is used to record the second water pressure parameter at different time points within the first time period; An analysis module, the analysis module is used to analyze the water pressure change trend based on the second water pressure parameter at different time points; A judgment module, the judgment module is used to judge whether there is an abnormality in the heating pipeline based on the water pressure change trend; An early warning display module is used to display an early warning symbol if it is determined that there is an abnormality in the heating pipeline; The electric water replenishment valve control module is used to open the electric water replenishment valve for replenishing water when the first water pressure parameter is less than a set water replenishment pressure threshold.

7. A heat exchange device, comprising: A wall-mounted boiler, wherein a controller, a water pump and a heat exchange device are arranged inside the wall-mounted boiler, wherein the water inlet of the heat exchange device is used to be connected to the water outlet of an external water supply system via an electric water supply valve, the water outlet of the heat exchange device is used to be connected to the water inlet of a heating pipe, the water inlet of the heat exchange device is also used to be connected to the return water port of the heating pipe, the water pump is arranged on the pipeline between the water inlet of the heat exchange device and the return water port of the heating pipe, and is characterized in that a heat exchange and liquid supply method as described in any one of claims 1 to 5 is applied.

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